Home / 1,861.02-2,792.15-691.13

Finding the Fourth Proportional to 1,861.02, 2,792.15 and 691.13

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Solution

The fourth proportional to 1,861.02, 2,792.15 and 691.13 is: 1,036.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.02 : 2,792.15 = 691.13 : x
  2. Step 2: Convert to fraction form
    1,861.02/2,792.15 = 691.13/x
  3. Step 3: Cross multiply
    1,861.02x = 2,792.15 × 691.13
  4. Step 4: Simplify right side
    1,861.02x = 1,929,731.68
  5. Step 5: Solve for x
    x = 1,929,731.68/1,861.02
  6. Step 6: Final answer
    x = 1,036.92

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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.