Home / 3,142.65-4,712.76-1,387.56

Finding the Fourth Proportional to 3,142.65, 4,712.76 and 1,387.56

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Solution

The fourth proportional to 3,142.65, 4,712.76 and 1,387.56 is: 2,080.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,142.65 : 4,712.76 = 1,387.56 : x
  2. Step 2: Convert to fraction form
    3,142.65/4,712.76 = 1,387.56/x
  3. Step 3: Cross multiply
    3,142.65x = 4,712.76 × 1,387.56
  4. Step 4: Simplify right side
    3,142.65x = 6,539,237.27
  5. Step 5: Solve for x
    x = 6,539,237.27/3,142.65
  6. Step 6: Final answer
    x = 2,080.80

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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.