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Finding the Fourth Proportional to 530.78, 731.79 and 343.94

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Solution

The fourth proportional to 530.78, 731.79 and 343.94 is: 474.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.78 : 731.79 = 343.94 : x
  2. Step 2: Convert to fraction form
    530.78/731.79 = 343.94/x
  3. Step 3: Cross multiply
    530.78x = 731.79 × 343.94
  4. Step 4: Simplify right side
    530.78x = 251,691.85
  5. Step 5: Solve for x
    x = 251,691.85/530.78
  6. Step 6: Final answer
    x = 474.19

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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.