Home / 1,542.85-2,128.61-913.41

Finding the Fourth Proportional to 1,542.85, 2,128.61 and 913.41

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Solution

The fourth proportional to 1,542.85, 2,128.61 and 913.41 is: 1,260.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.85 : 2,128.61 = 913.41 : x
  2. Step 2: Convert to fraction form
    1,542.85/2,128.61 = 913.41/x
  3. Step 3: Cross multiply
    1,542.85x = 2,128.61 × 913.41
  4. Step 4: Simplify right side
    1,542.85x = 1,944,295.94
  5. Step 5: Solve for x
    x = 1,944,295.94/1,542.85
  6. Step 6: Final answer
    x = 1,260.20

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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.