Home / 2,587.55-3,879.50-1,125.90

Finding the Fourth Proportional to 2,587.55, 3,879.50 and 1,125.90

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Solution

The fourth proportional to 2,587.55, 3,879.50 and 1,125.90 is: 1,688.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.55 : 3,879.50 = 1,125.90 : x
  2. Step 2: Convert to fraction form
    2,587.55/3,879.50 = 1,125.90/x
  3. Step 3: Cross multiply
    2,587.55x = 3,879.50 × 1,125.90
  4. Step 4: Simplify right side
    2,587.55x = 4,367,923.42
  5. Step 5: Solve for x
    x = 4,367,923.42/2,587.55
  6. Step 6: Final answer
    x = 1,688.06

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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.