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Finding the Fourth Proportional to 530.03, 731.07 and 520.31

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Solution

The fourth proportional to 530.03, 731.07 and 520.31 is: 717.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.03 : 731.07 = 520.31 : x
  2. Step 2: Convert to fraction form
    530.03/731.07 = 520.31/x
  3. Step 3: Cross multiply
    530.03x = 731.07 × 520.31
  4. Step 4: Simplify right side
    530.03x = 380,379.38
  5. Step 5: Solve for x
    x = 380,379.38/530.03
  6. Step 6: Final answer
    x = 717.66

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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.