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Finding the Fourth Proportional to 1,459.86, 2,189.49 and 637.68

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Solution

The fourth proportional to 1,459.86, 2,189.49 and 637.68 is: 956.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.86 : 2,189.49 = 637.68 : x
  2. Step 2: Convert to fraction form
    1,459.86/2,189.49 = 637.68/x
  3. Step 3: Cross multiply
    1,459.86x = 2,189.49 × 637.68
  4. Step 4: Simplify right side
    1,459.86x = 1,396,193.98
  5. Step 5: Solve for x
    x = 1,396,193.98/1,459.86
  6. Step 6: Final answer
    x = 956.39

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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.