Home / 1,139.26-1,707.45-1,127.02

Finding the Fourth Proportional to 1,139.26, 1,707.45 and 1,127.02

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Solution

The fourth proportional to 1,139.26, 1,707.45 and 1,127.02 is: 1,689.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.26 : 1,707.45 = 1,127.02 : x
  2. Step 2: Convert to fraction form
    1,139.26/1,707.45 = 1,127.02/x
  3. Step 3: Cross multiply
    1,139.26x = 1,707.45 × 1,127.02
  4. Step 4: Simplify right side
    1,139.26x = 1,924,330.30
  5. Step 5: Solve for x
    x = 1,924,330.30/1,139.26
  6. Step 6: Final answer
    x = 1,689.11

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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.