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Finding the Fourth Proportional to 620.60, 929.87 and 437.61

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Solution

The fourth proportional to 620.60, 929.87 and 437.61 is: 655.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.60 : 929.87 = 437.61 : x
  2. Step 2: Convert to fraction form
    620.60/929.87 = 437.61/x
  3. Step 3: Cross multiply
    620.60x = 929.87 × 437.61
  4. Step 4: Simplify right side
    620.60x = 406,920.93
  5. Step 5: Solve for x
    x = 406,920.93/620.60
  6. Step 6: Final answer
    x = 655.69

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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.