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Finding the Fourth Proportional to 715.41, 987.27 and 453.78

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Solution

The fourth proportional to 715.41, 987.27 and 453.78 is: 626.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.41 : 987.27 = 453.78 : x
  2. Step 2: Convert to fraction form
    715.41/987.27 = 453.78/x
  3. Step 3: Cross multiply
    715.41x = 987.27 × 453.78
  4. Step 4: Simplify right side
    715.41x = 448,003.38
  5. Step 5: Solve for x
    x = 448,003.38/715.41
  6. Step 6: Final answer
    x = 626.22

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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.