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Finding the Fourth Proportional to 530.88, 731.12 and 438

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Solution

The fourth proportional to 530.88, 731.12 and 438 is: 603.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.88 : 731.12 = 438 : x
  2. Step 2: Convert to fraction form
    530.88/731.12 = 438/x
  3. Step 3: Cross multiply
    530.88x = 731.12 × 438
  4. Step 4: Simplify right side
    530.88x = 320,230.56
  5. Step 5: Solve for x
    x = 320,230.56/530.88
  6. Step 6: Final answer
    x = 603.21

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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.