Home / 1,381.18-2,071.36-731.56

Finding the Fourth Proportional to 1,381.18, 2,071.36 and 731.56

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Solution

The fourth proportional to 1,381.18, 2,071.36 and 731.56 is: 1,097.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.18 : 2,071.36 = 731.56 : x
  2. Step 2: Convert to fraction form
    1,381.18/2,071.36 = 731.56/x
  3. Step 3: Cross multiply
    1,381.18x = 2,071.36 × 731.56
  4. Step 4: Simplify right side
    1,381.18x = 1,515,310.11
  5. Step 5: Solve for x
    x = 1,515,310.11/1,381.18
  6. Step 6: Final answer
    x = 1,097.12

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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.