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Finding the Fourth Proportional to 530.32, 731.54 and 320.43

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Solution

The fourth proportional to 530.32, 731.54 and 320.43 is: 442.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.32 : 731.54 = 320.43 : x
  2. Step 2: Convert to fraction form
    530.32/731.54 = 320.43/x
  3. Step 3: Cross multiply
    530.32x = 731.54 × 320.43
  4. Step 4: Simplify right side
    530.32x = 234,409.30
  5. Step 5: Solve for x
    x = 234,409.30/530.32
  6. Step 6: Final answer
    x = 442.01

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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.