Home / 1,220.40-1,831.92-1,084.32

Finding the Fourth Proportional to 1,220.40, 1,831.92 and 1,084.32

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Solution

The fourth proportional to 1,220.40, 1,831.92 and 1,084.32 is: 1,627.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.40 : 1,831.92 = 1,084.32 : x
  2. Step 2: Convert to fraction form
    1,220.40/1,831.92 = 1,084.32/x
  3. Step 3: Cross multiply
    1,220.40x = 1,831.92 × 1,084.32
  4. Step 4: Simplify right side
    1,220.40x = 1,986,387.49
  5. Step 5: Solve for x
    x = 1,986,387.49/1,220.40
  6. Step 6: Final answer
    x = 1,627.65

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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.