Home / 1,487.12-2,052.11-823.92

Finding the Fourth Proportional to 1,487.12, 2,052.11 and 823.92

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Solution

The fourth proportional to 1,487.12, 2,052.11 and 823.92 is: 1,136.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.12 : 2,052.11 = 823.92 : x
  2. Step 2: Convert to fraction form
    1,487.12/2,052.11 = 823.92/x
  3. Step 3: Cross multiply
    1,487.12x = 2,052.11 × 823.92
  4. Step 4: Simplify right side
    1,487.12x = 1,690,774.47
  5. Step 5: Solve for x
    x = 1,690,774.47/1,487.12
  6. Step 6: Final answer
    x = 1,136.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.