Home / 2,605.62-3,909.75-1,145.79

Finding the Fourth Proportional to 2,605.62, 3,909.75 and 1,145.79

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Solution

The fourth proportional to 2,605.62, 3,909.75 and 1,145.79 is: 1,719.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605.62 : 3,909.75 = 1,145.79 : x
  2. Step 2: Convert to fraction form
    2,605.62/3,909.75 = 1,145.79/x
  3. Step 3: Cross multiply
    2,605.62x = 3,909.75 × 1,145.79
  4. Step 4: Simplify right side
    2,605.62x = 4,479,752.45
  5. Step 5: Solve for x
    x = 4,479,752.45/2,605.62
  6. Step 6: Final answer
    x = 1,719.27

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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.