Home / 1,125.24-1,686.11-851.13

Finding the Fourth Proportional to 1,125.24, 1,686.11 and 851.13

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Solution

The fourth proportional to 1,125.24, 1,686.11 and 851.13 is: 1,275.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.24 : 1,686.11 = 851.13 : x
  2. Step 2: Convert to fraction form
    1,125.24/1,686.11 = 851.13/x
  3. Step 3: Cross multiply
    1,125.24x = 1,686.11 × 851.13
  4. Step 4: Simplify right side
    1,125.24x = 1,435,094.55
  5. Step 5: Solve for x
    x = 1,435,094.55/1,125.24
  6. Step 6: Final answer
    x = 1,275.37

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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.