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Finding the Fourth Proportional to 715.97, 987.87 and 453.83

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Solution

The fourth proportional to 715.97, 987.87 and 453.83 is: 626.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.97 : 987.87 = 453.83 : x
  2. Step 2: Convert to fraction form
    715.97/987.87 = 453.83/x
  3. Step 3: Cross multiply
    715.97x = 987.87 × 453.83
  4. Step 4: Simplify right side
    715.97x = 448,325.04
  5. Step 5: Solve for x
    x = 448,325.04/715.97
  6. Step 6: Final answer
    x = 626.18

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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.