Home / 1,256.18-1,732.47-1,080.81

Finding the Fourth Proportional to 1,256.18, 1,732.47 and 1,080.81

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Solution

The fourth proportional to 1,256.18, 1,732.47 and 1,080.81 is: 1,490.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.18 : 1,732.47 = 1,080.81 : x
  2. Step 2: Convert to fraction form
    1,256.18/1,732.47 = 1,080.81/x
  3. Step 3: Cross multiply
    1,256.18x = 1,732.47 × 1,080.81
  4. Step 4: Simplify right side
    1,256.18x = 1,872,470.90
  5. Step 5: Solve for x
    x = 1,872,470.90/1,256.18
  6. Step 6: Final answer
    x = 1,490.61

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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.