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Finding the Fourth Proportional to 530.11, 731.44 and 308.95

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Solution

The fourth proportional to 530.11, 731.44 and 308.95 is: 426.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.11 : 731.44 = 308.95 : x
  2. Step 2: Convert to fraction form
    530.11/731.44 = 308.95/x
  3. Step 3: Cross multiply
    530.11x = 731.44 × 308.95
  4. Step 4: Simplify right side
    530.11x = 225,978.39
  5. Step 5: Solve for x
    x = 225,978.39/530.11
  6. Step 6: Final answer
    x = 426.29

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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.