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Finding the Fourth Proportional to 656,706.56, 985,115.72 and 207,307.20

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Solution

The fourth proportional to 656,706.56, 985,115.72 and 207,307.20 is: 310,978.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,706.56 : 985,115.72 = 207,307.20 : x
  2. Step 2: Convert to fraction form
    656,706.56/985,115.72 = 207,307.20/x
  3. Step 3: Cross multiply
    656,706.56x = 985,115.72 × 207,307.20
  4. Step 4: Simplify right side
    656,706.56x = 204,221,581,589.18
  5. Step 5: Solve for x
    x = 204,221,581,589.18/656,706.56
  6. Step 6: Final answer
    x = 310,978.44

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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.