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Finding the Fourth Proportional to 825.34, 1,138.98 and 476.02

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Solution

The fourth proportional to 825.34, 1,138.98 and 476.02 is: 656.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.34 : 1,138.98 = 476.02 : x
  2. Step 2: Convert to fraction form
    825.34/1,138.98 = 476.02/x
  3. Step 3: Cross multiply
    825.34x = 1,138.98 × 476.02
  4. Step 4: Simplify right side
    825.34x = 542,177.26
  5. Step 5: Solve for x
    x = 542,177.26/825.34
  6. Step 6: Final answer
    x = 656.91

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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.