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Finding the Fourth Proportional to 512.55, 707.27 and 291.49

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Solution

The fourth proportional to 512.55, 707.27 and 291.49 is: 402.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.55 : 707.27 = 291.49 : x
  2. Step 2: Convert to fraction form
    512.55/707.27 = 291.49/x
  3. Step 3: Cross multiply
    512.55x = 707.27 × 291.49
  4. Step 4: Simplify right side
    512.55x = 206,158.91
  5. Step 5: Solve for x
    x = 206,158.91/512.55
  6. Step 6: Final answer
    x = 402.22

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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.