Home / 1,613.95-2,227.24-905.79

Finding the Fourth Proportional to 1,613.95, 2,227.24 and 905.79

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Solution

The fourth proportional to 1,613.95, 2,227.24 and 905.79 is: 1,249.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.95 : 2,227.24 = 905.79 : x
  2. Step 2: Convert to fraction form
    1,613.95/2,227.24 = 905.79/x
  3. Step 3: Cross multiply
    1,613.95x = 2,227.24 × 905.79
  4. Step 4: Simplify right side
    1,613.95x = 2,017,411.72
  5. Step 5: Solve for x
    x = 2,017,411.72/1,613.95
  6. Step 6: Final answer
    x = 1,249.98

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Half scale
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Double scale
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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.