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Finding the Fourth Proportional to 521.92, 722.10 and 456.49

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Solution

The fourth proportional to 521.92, 722.10 and 456.49 is: 631.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.92 : 722.10 = 456.49 : x
  2. Step 2: Convert to fraction form
    521.92/722.10 = 456.49/x
  3. Step 3: Cross multiply
    521.92x = 722.10 × 456.49
  4. Step 4: Simplify right side
    521.92x = 329,631.43
  5. Step 5: Solve for x
    x = 329,631.43/521.92
  6. Step 6: Final answer
    x = 631.57

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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.