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Finding the Fourth Proportional to 634.28, 875.00 and 398.52

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Solution

The fourth proportional to 634.28, 875.00 and 398.52 is: 549.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.28 : 875.00 = 398.52 : x
  2. Step 2: Convert to fraction form
    634.28/875.00 = 398.52/x
  3. Step 3: Cross multiply
    634.28x = 875.00 × 398.52
  4. Step 4: Simplify right side
    634.28x = 348,706.00
  5. Step 5: Solve for x
    x = 348,706.00/634.28
  6. Step 6: Final answer
    x = 549.77

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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.