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Finding the Fourth Proportional to 530.12, 731.51 and 308.91

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Solution

The fourth proportional to 530.12, 731.51 and 308.91 is: 426.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.12 : 731.51 = 308.91 : x
  2. Step 2: Convert to fraction form
    530.12/731.51 = 308.91/x
  3. Step 3: Cross multiply
    530.12x = 731.51 × 308.91
  4. Step 4: Simplify right side
    530.12x = 225,972.24
  5. Step 5: Solve for x
    x = 225,972.24/530.12
  6. Step 6: Final answer
    x = 426.27

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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.