Home / 1,298.24-1,942.56-1,126.88

Finding the Fourth Proportional to 1,298.24, 1,942.56 and 1,126.88

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Solution

The fourth proportional to 1,298.24, 1,942.56 and 1,126.88 is: 1,686.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.24 : 1,942.56 = 1,126.88 : x
  2. Step 2: Convert to fraction form
    1,298.24/1,942.56 = 1,126.88/x
  3. Step 3: Cross multiply
    1,298.24x = 1,942.56 × 1,126.88
  4. Step 4: Simplify right side
    1,298.24x = 2,189,032.01
  5. Step 5: Solve for x
    x = 2,189,032.01/1,298.24
  6. Step 6: Final answer
    x = 1,686.15

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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.