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Finding the Fourth Proportional to 354.13, 531.21 and 307.47

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Solution

The fourth proportional to 354.13, 531.21 and 307.47 is: 461.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.13 : 531.21 = 307.47 : x
  2. Step 2: Convert to fraction form
    354.13/531.21 = 307.47/x
  3. Step 3: Cross multiply
    354.13x = 531.21 × 307.47
  4. Step 4: Simplify right side
    354.13x = 163,331.14
  5. Step 5: Solve for x
    x = 163,331.14/354.13
  6. Step 6: Final answer
    x = 461.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.