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Finding the Fourth Proportional to 531.92, 797.71 and 207.21

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Solution

The fourth proportional to 531.92, 797.71 and 207.21 is: 310.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.92 : 797.71 = 207.21 : x
  2. Step 2: Convert to fraction form
    531.92/797.71 = 207.21/x
  3. Step 3: Cross multiply
    531.92x = 797.71 × 207.21
  4. Step 4: Simplify right side
    531.92x = 165,293.49
  5. Step 5: Solve for x
    x = 165,293.49/531.92
  6. Step 6: Final answer
    x = 310.75

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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.