Home / 407,623.40-611,435.10-127,140.20

Finding the Fourth Proportional to 407,623.40, 611,435.10 and 127,140.20

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Solution

The fourth proportional to 407,623.40, 611,435.10 and 127,140.20 is: 190,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,623.40 : 611,435.10 = 127,140.20 : x
  2. Step 2: Convert to fraction form
    407,623.40/611,435.10 = 127,140.20/x
  3. Step 3: Cross multiply
    407,623.40x = 611,435.10 × 127,140.20
  4. Step 4: Simplify right side
    407,623.40x = 77,737,980,901.02
  5. Step 5: Solve for x
    x = 77,737,980,901.02/407,623.40
  6. Step 6: Final answer
    x = 190,710.30

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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.