Home / 3,140.80-4,707.28-2,749.92

Finding the Fourth Proportional to 3,140.80, 4,707.28 and 2,749.92

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Solution

The fourth proportional to 3,140.80, 4,707.28 and 2,749.92 is: 4,121.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.80 : 4,707.28 = 2,749.92 : x
  2. Step 2: Convert to fraction form
    3,140.80/4,707.28 = 2,749.92/x
  3. Step 3: Cross multiply
    3,140.80x = 4,707.28 × 2,749.92
  4. Step 4: Simplify right side
    3,140.80x = 12,944,643.42
  5. Step 5: Solve for x
    x = 12,944,643.42/3,140.80
  6. Step 6: Final answer
    x = 4,121.45

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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.