Home / 1,542.59-2,129.36-1,378.57

Finding the Fourth Proportional to 1,542.59, 2,129.36 and 1,378.57

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Solution

The fourth proportional to 1,542.59, 2,129.36 and 1,378.57 is: 1,902.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.59 : 2,129.36 = 1,378.57 : x
  2. Step 2: Convert to fraction form
    1,542.59/2,129.36 = 1,378.57/x
  3. Step 3: Cross multiply
    1,542.59x = 2,129.36 × 1,378.57
  4. Step 4: Simplify right side
    1,542.59x = 2,935,475.22
  5. Step 5: Solve for x
    x = 2,935,475.22/1,542.59
  6. Step 6: Final answer
    x = 1,902.95

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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.