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Finding the Fourth Proportional to 713.18, 984.21 and 451.28

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Solution

The fourth proportional to 713.18, 984.21 and 451.28 is: 622.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.18 : 984.21 = 451.28 : x
  2. Step 2: Convert to fraction form
    713.18/984.21 = 451.28/x
  3. Step 3: Cross multiply
    713.18x = 984.21 × 451.28
  4. Step 4: Simplify right side
    713.18x = 444,154.29
  5. Step 5: Solve for x
    x = 444,154.29/713.18
  6. Step 6: Final answer
    x = 622.78

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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.