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Finding the Fourth Proportional to 530.72, 732.38 and 320.92

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Solution

The fourth proportional to 530.72, 732.38 and 320.92 is: 442.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.72 : 732.38 = 320.92 : x
  2. Step 2: Convert to fraction form
    530.72/732.38 = 320.92/x
  3. Step 3: Cross multiply
    530.72x = 732.38 × 320.92
  4. Step 4: Simplify right side
    530.72x = 235,035.39
  5. Step 5: Solve for x
    x = 235,035.39/530.72
  6. Step 6: Final answer
    x = 442.86

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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.