Home / 1,542.72-2,129.10-913.44

Finding the Fourth Proportional to 1,542.72, 2,129.10 and 913.44

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Solution

The fourth proportional to 1,542.72, 2,129.10 and 913.44 is: 1,260.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.72 : 2,129.10 = 913.44 : x
  2. Step 2: Convert to fraction form
    1,542.72/2,129.10 = 913.44/x
  3. Step 3: Cross multiply
    1,542.72x = 2,129.10 × 913.44
  4. Step 4: Simplify right side
    1,542.72x = 1,944,805.10
  5. Step 5: Solve for x
    x = 1,944,805.10/1,542.72
  6. Step 6: Final answer
    x = 1,260.63

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1.5x scale

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.