Home / 1,545.28-2,131.92-1,080.16

Finding the Fourth Proportional to 1,545.28, 2,131.92 and 1,080.16

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Solution

The fourth proportional to 1,545.28, 2,131.92 and 1,080.16 is: 1,490.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.28 : 2,131.92 = 1,080.16 : x
  2. Step 2: Convert to fraction form
    1,545.28/2,131.92 = 1,080.16/x
  3. Step 3: Cross multiply
    1,545.28x = 2,131.92 × 1,080.16
  4. Step 4: Simplify right side
    1,545.28x = 2,302,814.71
  5. Step 5: Solve for x
    x = 2,302,814.71/1,545.28
  6. Step 6: Final answer
    x = 1,490.22

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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.