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Finding the Fourth Proportional to 712.34, 983.03 and 397.61

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Solution

The fourth proportional to 712.34, 983.03 and 397.61 is: 548.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.34 : 983.03 = 397.61 : x
  2. Step 2: Convert to fraction form
    712.34/983.03 = 397.61/x
  3. Step 3: Cross multiply
    712.34x = 983.03 × 397.61
  4. Step 4: Simplify right side
    712.34x = 390,857.64
  5. Step 5: Solve for x
    x = 390,857.64/712.34
  6. Step 6: Final answer
    x = 548.70

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1.5x scale

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.