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Finding the Fourth Proportional to 712.62, 983.46 and 418.02

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Solution

The fourth proportional to 712.62, 983.46 and 418.02 is: 576.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.62 : 983.46 = 418.02 : x
  2. Step 2: Convert to fraction form
    712.62/983.46 = 418.02/x
  3. Step 3: Cross multiply
    712.62x = 983.46 × 418.02
  4. Step 4: Simplify right side
    712.62x = 411,105.95
  5. Step 5: Solve for x
    x = 411,105.95/712.62
  6. Step 6: Final answer
    x = 576.89

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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.