Home / 1,407.38-1,937.94-1,275.56

Finding the Fourth Proportional to 1,407.38, 1,937.94 and 1,275.56

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Solution

The fourth proportional to 1,407.38, 1,937.94 and 1,275.56 is: 1,756.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.38 : 1,937.94 = 1,275.56 : x
  2. Step 2: Convert to fraction form
    1,407.38/1,937.94 = 1,275.56/x
  3. Step 3: Cross multiply
    1,407.38x = 1,937.94 × 1,275.56
  4. Step 4: Simplify right side
    1,407.38x = 2,471,958.75
  5. Step 5: Solve for x
    x = 2,471,958.75/1,407.38
  6. Step 6: Final answer
    x = 1,756.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.