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Finding the Fourth Proportional to 530.29, 732.29 and 399.07

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Solution

The fourth proportional to 530.29, 732.29 and 399.07 is: 551.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.29 : 732.29 = 399.07 : x
  2. Step 2: Convert to fraction form
    530.29/732.29 = 399.07/x
  3. Step 3: Cross multiply
    530.29x = 732.29 × 399.07
  4. Step 4: Simplify right side
    530.29x = 292,234.97
  5. Step 5: Solve for x
    x = 292,234.97/530.29
  6. Step 6: Final answer
    x = 551.09

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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.