Home / 697,107.80-1,045,661.70-621,000.20

Finding the Fourth Proportional to 697,107.80, 1,045,661.70 and 621,000.20

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Solution

The fourth proportional to 697,107.80, 1,045,661.70 and 621,000.20 is: 931,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,107.80 : 1,045,661.70 = 621,000.20 : x
  2. Step 2: Convert to fraction form
    697,107.80/1,045,661.70 = 621,000.20/x
  3. Step 3: Cross multiply
    697,107.80x = 1,045,661.70 × 621,000.20
  4. Step 4: Simplify right side
    697,107.80x = 649,356,124,832.34
  5. Step 5: Solve for x
    x = 649,356,124,832.34/697,107.80
  6. Step 6: Final answer
    x = 931,500.30

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Double scale
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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.