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Finding the Fourth Proportional to 1,489.13, 2,234.64 and 874.07

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Solution

The fourth proportional to 1,489.13, 2,234.64 and 874.07 is: 1,311.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.13 : 2,234.64 = 874.07 : x
  2. Step 2: Convert to fraction form
    1,489.13/2,234.64 = 874.07/x
  3. Step 3: Cross multiply
    1,489.13x = 2,234.64 × 874.07
  4. Step 4: Simplify right side
    1,489.13x = 1,953,231.78
  5. Step 5: Solve for x
    x = 1,953,231.78/1,489.13
  6. Step 6: Final answer
    x = 1,311.66

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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.