Home / 3,545.90-5,315.42-1,986.66

Finding the Fourth Proportional to 3,545.90, 5,315.42 and 1,986.66

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Solution

The fourth proportional to 3,545.90, 5,315.42 and 1,986.66 is: 2,978.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,545.90 : 5,315.42 = 1,986.66 : x
  2. Step 2: Convert to fraction form
    3,545.90/5,315.42 = 1,986.66/x
  3. Step 3: Cross multiply
    3,545.90x = 5,315.42 × 1,986.66
  4. Step 4: Simplify right side
    3,545.90x = 10,559,932.30
  5. Step 5: Solve for x
    x = 10,559,932.30/3,545.90
  6. Step 6: Final answer
    x = 2,978.07

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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.