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Finding the Fourth Proportional to 457.68, 630.88 and 402.33

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Solution

The fourth proportional to 457.68, 630.88 and 402.33 is: 554.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.68 : 630.88 = 402.33 : x
  2. Step 2: Convert to fraction form
    457.68/630.88 = 402.33/x
  3. Step 3: Cross multiply
    457.68x = 630.88 × 402.33
  4. Step 4: Simplify right side
    457.68x = 253,821.95
  5. Step 5: Solve for x
    x = 253,821.95/457.68
  6. Step 6: Final answer
    x = 554.58

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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.