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Finding the Fourth Proportional to 580,007.20, 870,010.80 and 391,050.40

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Solution

The fourth proportional to 580,007.20, 870,010.80 and 391,050.40 is: 586,575.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,007.20 : 870,010.80 = 391,050.40 : x
  2. Step 2: Convert to fraction form
    580,007.20/870,010.80 = 391,050.40/x
  3. Step 3: Cross multiply
    580,007.20x = 870,010.80 × 391,050.40
  4. Step 4: Simplify right side
    580,007.20x = 340,218,071,344.32
  5. Step 5: Solve for x
    x = 340,218,071,344.32/580,007.20
  6. Step 6: Final answer
    x = 586,575.60

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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.