Home / 3,140.26-4,710.31-831.76

Finding the Fourth Proportional to 3,140.26, 4,710.31 and 831.76

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Solution

The fourth proportional to 3,140.26, 4,710.31 and 831.76 is: 1,247.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.26 : 4,710.31 = 831.76 : x
  2. Step 2: Convert to fraction form
    3,140.26/4,710.31 = 831.76/x
  3. Step 3: Cross multiply
    3,140.26x = 4,710.31 × 831.76
  4. Step 4: Simplify right side
    3,140.26x = 3,917,847.45
  5. Step 5: Solve for x
    x = 3,917,847.45/3,140.26
  6. Step 6: Final answer
    x = 1,247.62

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1.5x scale

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.