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Finding the Fourth Proportional to 457.42, 631.38 and 282.82

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Solution

The fourth proportional to 457.42, 631.38 and 282.82 is: 390.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.42 : 631.38 = 282.82 : x
  2. Step 2: Convert to fraction form
    457.42/631.38 = 282.82/x
  3. Step 3: Cross multiply
    457.42x = 631.38 × 282.82
  4. Step 4: Simplify right side
    457.42x = 178,566.89
  5. Step 5: Solve for x
    x = 178,566.89/457.42
  6. Step 6: Final answer
    x = 390.38

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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.