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Finding the Fourth Proportional to 716.08, 987.78 and 453.64

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Solution

The fourth proportional to 716.08, 987.78 and 453.64 is: 625.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.08 : 987.78 = 453.64 : x
  2. Step 2: Convert to fraction form
    716.08/987.78 = 453.64/x
  3. Step 3: Cross multiply
    716.08x = 987.78 × 453.64
  4. Step 4: Simplify right side
    716.08x = 448,096.52
  5. Step 5: Solve for x
    x = 448,096.52/716.08
  6. Step 6: Final answer
    x = 625.76

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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.