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Finding the Fourth Proportional to 1,458.53, 2,187.40 and 636.61

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Solution

The fourth proportional to 1,458.53, 2,187.40 and 636.61 is: 954.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.53 : 2,187.40 = 636.61 : x
  2. Step 2: Convert to fraction form
    1,458.53/2,187.40 = 636.61/x
  3. Step 3: Cross multiply
    1,458.53x = 2,187.40 × 636.61
  4. Step 4: Simplify right side
    1,458.53x = 1,392,520.71
  5. Step 5: Solve for x
    x = 1,392,520.71/1,458.53
  6. Step 6: Final answer
    x = 954.74

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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.