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Finding the Fourth Proportional to 1,459.28, 2,187.54 and 636.87

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Solution

The fourth proportional to 1,459.28, 2,187.54 and 636.87 is: 954.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.28 : 2,187.54 = 636.87 : x
  2. Step 2: Convert to fraction form
    1,459.28/2,187.54 = 636.87/x
  3. Step 3: Cross multiply
    1,459.28x = 2,187.54 × 636.87
  4. Step 4: Simplify right side
    1,459.28x = 1,393,178.60
  5. Step 5: Solve for x
    x = 1,393,178.60/1,459.28
  6. Step 6: Final answer
    x = 954.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.