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Finding the Fourth Proportional to 634.08, 875.16 and 493.92

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Solution

The fourth proportional to 634.08, 875.16 and 493.92 is: 681.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.08 : 875.16 = 493.92 : x
  2. Step 2: Convert to fraction form
    634.08/875.16 = 493.92/x
  3. Step 3: Cross multiply
    634.08x = 875.16 × 493.92
  4. Step 4: Simplify right side
    634.08x = 432,259.03
  5. Step 5: Solve for x
    x = 432,259.03/634.08
  6. Step 6: Final answer
    x = 681.71

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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.