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Finding the Fourth Proportional to 2,590.92, 3,886.29 and 1,129.73

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Solution

The fourth proportional to 2,590.92, 3,886.29 and 1,129.73 is: 1,694.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,590.92 : 3,886.29 = 1,129.73 : x
  2. Step 2: Convert to fraction form
    2,590.92/3,886.29 = 1,129.73/x
  3. Step 3: Cross multiply
    2,590.92x = 3,886.29 × 1,129.73
  4. Step 4: Simplify right side
    2,590.92x = 4,390,438.97
  5. Step 5: Solve for x
    x = 4,390,438.97/2,590.92
  6. Step 6: Final answer
    x = 1,694.55

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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.