Home / 1,380.59-2,070.27-731.17

Finding the Fourth Proportional to 1,380.59, 2,070.27 and 731.17

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Solution

The fourth proportional to 1,380.59, 2,070.27 and 731.17 is: 1,096.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.59 : 2,070.27 = 731.17 : x
  2. Step 2: Convert to fraction form
    1,380.59/2,070.27 = 731.17/x
  3. Step 3: Cross multiply
    1,380.59x = 2,070.27 × 731.17
  4. Step 4: Simplify right side
    1,380.59x = 1,513,719.32
  5. Step 5: Solve for x
    x = 1,513,719.32/1,380.59
  6. Step 6: Final answer
    x = 1,096.43

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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.