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Finding the Fourth Proportional to 1,769.32, 2,652.45 and 672.91

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Solution

The fourth proportional to 1,769.32, 2,652.45 and 672.91 is: 1,008.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,769.32 : 2,652.45 = 672.91 : x
  2. Step 2: Convert to fraction form
    1,769.32/2,652.45 = 672.91/x
  3. Step 3: Cross multiply
    1,769.32x = 2,652.45 × 672.91
  4. Step 4: Simplify right side
    1,769.32x = 1,784,860.13
  5. Step 5: Solve for x
    x = 1,784,860.13/1,769.32
  6. Step 6: Final answer
    x = 1,008.78

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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.