Home / 1,542.75-2,129.08-913.19

Finding the Fourth Proportional to 1,542.75, 2,129.08 and 913.19

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Solution

The fourth proportional to 1,542.75, 2,129.08 and 913.19 is: 1,260.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.75 : 2,129.08 = 913.19 : x
  2. Step 2: Convert to fraction form
    1,542.75/2,129.08 = 913.19/x
  3. Step 3: Cross multiply
    1,542.75x = 2,129.08 × 913.19
  4. Step 4: Simplify right side
    1,542.75x = 1,944,245.70
  5. Step 5: Solve for x
    x = 1,944,245.70/1,542.75
  6. Step 6: Final answer
    x = 1,260.25

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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.