Home / 1,831.20-2,747.70-1,392.30

Finding the Fourth Proportional to 1,831.20, 2,747.70 and 1,392.30

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Solution

The fourth proportional to 1,831.20, 2,747.70 and 1,392.30 is: 2,089.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,831.20 : 2,747.70 = 1,392.30 : x
  2. Step 2: Convert to fraction form
    1,831.20/2,747.70 = 1,392.30/x
  3. Step 3: Cross multiply
    1,831.20x = 2,747.70 × 1,392.30
  4. Step 4: Simplify right side
    1,831.20x = 3,825,622.71
  5. Step 5: Solve for x
    x = 3,825,622.71/1,831.20
  6. Step 6: Final answer
    x = 2,089.13

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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.