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Finding the Fourth Proportional to 514.49, 710.82 and 396.90

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Solution

The fourth proportional to 514.49, 710.82 and 396.90 is: 548.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.49 : 710.82 = 396.90 : x
  2. Step 2: Convert to fraction form
    514.49/710.82 = 396.90/x
  3. Step 3: Cross multiply
    514.49x = 710.82 × 396.90
  4. Step 4: Simplify right side
    514.49x = 282,124.46
  5. Step 5: Solve for x
    x = 282,124.46/514.49
  6. Step 6: Final answer
    x = 548.36

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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.