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Finding the Fourth Proportional to 712.39, 983.02 and 417.83

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Solution

The fourth proportional to 712.39, 983.02 and 417.83 is: 576.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.39 : 983.02 = 417.83 : x
  2. Step 2: Convert to fraction form
    712.39/983.02 = 417.83/x
  3. Step 3: Cross multiply
    712.39x = 983.02 × 417.83
  4. Step 4: Simplify right side
    712.39x = 410,729.29
  5. Step 5: Solve for x
    x = 410,729.29/712.39
  6. Step 6: Final answer
    x = 576.55

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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.