Home / 2,590.61-3,885.92-1,129.60

Finding the Fourth Proportional to 2,590.61, 3,885.92 and 1,129.60

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Solution

The fourth proportional to 2,590.61, 3,885.92 and 1,129.60 is: 1,694.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,590.61 : 3,885.92 = 1,129.60 : x
  2. Step 2: Convert to fraction form
    2,590.61/3,885.92 = 1,129.60/x
  3. Step 3: Cross multiply
    2,590.61x = 3,885.92 × 1,129.60
  4. Step 4: Simplify right side
    2,590.61x = 4,389,510.15
  5. Step 5: Solve for x
    x = 4,389,510.15/2,590.61
  6. Step 6: Final answer
    x = 1,694.39

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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.