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Finding the Fourth Proportional to 456.92, 631.43 and 346.20

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Solution

The fourth proportional to 456.92, 631.43 and 346.20 is: 478.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.92 : 631.43 = 346.20 : x
  2. Step 2: Convert to fraction form
    456.92/631.43 = 346.20/x
  3. Step 3: Cross multiply
    456.92x = 631.43 × 346.20
  4. Step 4: Simplify right side
    456.92x = 218,601.82
  5. Step 5: Solve for x
    x = 218,601.82/456.92
  6. Step 6: Final answer
    x = 478.43

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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.