Home / 1,128,085.92-1,691,287.29-678,701.48

Finding the Fourth Proportional to 1,128,085.92, 1,691,287.29 and 678,701.48

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Solution

The fourth proportional to 1,128,085.92, 1,691,287.29 and 678,701.48 is: 1,017,545.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,085.92 : 1,691,287.29 = 678,701.48 : x
  2. Step 2: Convert to fraction form
    1,128,085.92/1,691,287.29 = 678,701.48/x
  3. Step 3: Cross multiply
    1,128,085.92x = 1,691,287.29 × 678,701.48
  4. Step 4: Simplify right side
    1,128,085.92x = 1,147,879,178,371.75
  5. Step 5: Solve for x
    x = 1,147,879,178,371.75/1,128,085.92
  6. Step 6: Final answer
    x = 1,017,545.88

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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.