Home / 3,140.28-4,710.34-831.80

Finding the Fourth Proportional to 3,140.28, 4,710.34 and 831.80

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Solution

The fourth proportional to 3,140.28, 4,710.34 and 831.80 is: 1,247.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.28 : 4,710.34 = 831.80 : x
  2. Step 2: Convert to fraction form
    3,140.28/4,710.34 = 831.80/x
  3. Step 3: Cross multiply
    3,140.28x = 4,710.34 × 831.80
  4. Step 4: Simplify right side
    3,140.28x = 3,918,060.81
  5. Step 5: Solve for x
    x = 3,918,060.81/3,140.28
  6. Step 6: Final answer
    x = 1,247.68

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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.