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Finding the Fourth Proportional to 713.28, 985.00 and 674.45

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Solution

The fourth proportional to 713.28, 985.00 and 674.45 is: 931.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.28 : 985.00 = 674.45 : x
  2. Step 2: Convert to fraction form
    713.28/985.00 = 674.45/x
  3. Step 3: Cross multiply
    713.28x = 985.00 × 674.45
  4. Step 4: Simplify right side
    713.28x = 664,333.44
  5. Step 5: Solve for x
    x = 664,333.44/713.28
  6. Step 6: Final answer
    x = 931.38

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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.