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Finding the Fourth Proportional to 457.47, 631.46 and 339.62

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Solution

The fourth proportional to 457.47, 631.46 and 339.62 is: 468.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.47 : 631.46 = 339.62 : x
  2. Step 2: Convert to fraction form
    457.47/631.46 = 339.62/x
  3. Step 3: Cross multiply
    457.47x = 631.46 × 339.62
  4. Step 4: Simplify right side
    457.47x = 214,454.14
  5. Step 5: Solve for x
    x = 214,454.14/457.47
  6. Step 6: Final answer
    x = 468.78

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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.