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Finding the Fourth Proportional to 530.27, 731.85 and 309.35

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Solution

The fourth proportional to 530.27, 731.85 and 309.35 is: 426.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.27 : 731.85 = 309.35 : x
  2. Step 2: Convert to fraction form
    530.27/731.85 = 309.35/x
  3. Step 3: Cross multiply
    530.27x = 731.85 × 309.35
  4. Step 4: Simplify right side
    530.27x = 226,394.14
  5. Step 5: Solve for x
    x = 226,394.14/530.27
  6. Step 6: Final answer
    x = 426.95

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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.