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Finding the Fourth Proportional to 1,459.68, 2,187.45 and 636.21

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Solution

The fourth proportional to 1,459.68, 2,187.45 and 636.21 is: 953.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.68 : 2,187.45 = 636.21 : x
  2. Step 2: Convert to fraction form
    1,459.68/2,187.45 = 636.21/x
  3. Step 3: Cross multiply
    1,459.68x = 2,187.45 × 636.21
  4. Step 4: Simplify right side
    1,459.68x = 1,391,677.56
  5. Step 5: Solve for x
    x = 1,391,677.56/1,459.68
  6. Step 6: Final answer
    x = 953.41

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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.