Home / 645,140,917.80-967,711,376.70-578,628,124.20

Finding the Fourth Proportional to 645,140,917.80, 967,711,376.70 and 578,628,124.20

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Solution

The fourth proportional to 645,140,917.80, 967,711,376.70 and 578,628,124.20 is: 867,942,186.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,140,917.80 : 967,711,376.70 = 578,628,124.20 : x
  2. Step 2: Convert to fraction form
    645,140,917.80/967,711,376.70 = 578,628,124.20/x
  3. Step 3: Cross multiply
    645,140,917.80x = 967,711,376.70 × 578,628,124.20
  4. Step 4: Simplify right side
    645,140,917.80x = 559,945,018,666,920,640
  5. Step 5: Solve for x
    x = 559,945,018,666,920,640/645,140,917.80
  6. Step 6: Final answer
    x = 867,942,186.30

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Double scale
Find fourth proportional to 645,140,918.80, 967,711,378.20 and 578,628,125.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.