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Finding the Fourth Proportional to 2,569.95, 3,854.93 and 721.13

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Solution

The fourth proportional to 2,569.95, 3,854.93 and 721.13 is: 1,081.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,569.95 : 3,854.93 = 721.13 : x
  2. Step 2: Convert to fraction form
    2,569.95/3,854.93 = 721.13/x
  3. Step 3: Cross multiply
    2,569.95x = 3,854.93 × 721.13
  4. Step 4: Simplify right side
    2,569.95x = 2,779,882.79
  5. Step 5: Solve for x
    x = 2,779,882.79/2,569.95
  6. Step 6: Final answer
    x = 1,081.69

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.