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Finding the Fourth Proportional to 713.80, 987.12 and 626.32

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Solution

The fourth proportional to 713.80, 987.12 and 626.32 is: 866.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.80 : 987.12 = 626.32 : x
  2. Step 2: Convert to fraction form
    713.80/987.12 = 626.32/x
  3. Step 3: Cross multiply
    713.80x = 987.12 × 626.32
  4. Step 4: Simplify right side
    713.80x = 618,253.00
  5. Step 5: Solve for x
    x = 618,253.00/713.80
  6. Step 6: Final answer
    x = 866.14

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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.