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Finding the Fourth Proportional to 530.38, 731.77 and 309.32

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Solution

The fourth proportional to 530.38, 731.77 and 309.32 is: 426.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.38 : 731.77 = 309.32 : x
  2. Step 2: Convert to fraction form
    530.38/731.77 = 309.32/x
  3. Step 3: Cross multiply
    530.38x = 731.77 × 309.32
  4. Step 4: Simplify right side
    530.38x = 226,349.41
  5. Step 5: Solve for x
    x = 226,349.41/530.38
  6. Step 6: Final answer
    x = 426.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.