Home / 1,508.42-2,081.25-918.92

Finding the Fourth Proportional to 1,508.42, 2,081.25 and 918.92

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Solution

The fourth proportional to 1,508.42, 2,081.25 and 918.92 is: 1,267.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,508.42 : 2,081.25 = 918.92 : x
  2. Step 2: Convert to fraction form
    1,508.42/2,081.25 = 918.92/x
  3. Step 3: Cross multiply
    1,508.42x = 2,081.25 × 918.92
  4. Step 4: Simplify right side
    1,508.42x = 1,912,502.25
  5. Step 5: Solve for x
    x = 1,912,502.25/1,508.42
  6. Step 6: Final answer
    x = 1,267.88

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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.