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Finding the Fourth Proportional to 457.66, 630.20 and 392.02

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Solution

The fourth proportional to 457.66, 630.20 and 392.02 is: 539.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.66 : 630.20 = 392.02 : x
  2. Step 2: Convert to fraction form
    457.66/630.20 = 392.02/x
  3. Step 3: Cross multiply
    457.66x = 630.20 × 392.02
  4. Step 4: Simplify right side
    457.66x = 247,051.00
  5. Step 5: Solve for x
    x = 247,051.00/457.66
  6. Step 6: Final answer
    x = 539.81

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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.