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Finding the Fourth Proportional to 487,376.10, 731,064.15 and 206,856.90

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Solution

The fourth proportional to 487,376.10, 731,064.15 and 206,856.90 is: 310,285.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,376.10 : 731,064.15 = 206,856.90 : x
  2. Step 2: Convert to fraction form
    487,376.10/731,064.15 = 206,856.90/x
  3. Step 3: Cross multiply
    487,376.10x = 731,064.15 × 206,856.90
  4. Step 4: Simplify right side
    487,376.10x = 151,225,663,770.14
  5. Step 5: Solve for x
    x = 151,225,663,770.14/487,376.10
  6. Step 6: Final answer
    x = 310,285.35

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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.