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Finding the Fourth Proportional to 708.59, 974.38 and 615.17

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Solution

The fourth proportional to 708.59, 974.38 and 615.17 is: 845.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.59 : 974.38 = 615.17 : x
  2. Step 2: Convert to fraction form
    708.59/974.38 = 615.17/x
  3. Step 3: Cross multiply
    708.59x = 974.38 × 615.17
  4. Step 4: Simplify right side
    708.59x = 599,405.92
  5. Step 5: Solve for x
    x = 599,405.92/708.59
  6. Step 6: Final answer
    x = 845.91

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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.