Home / 392,948.20-589,422.30-126,717.40

Finding the Fourth Proportional to 392,948.20, 589,422.30 and 126,717.40

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Solution

The fourth proportional to 392,948.20, 589,422.30 and 126,717.40 is: 190,076.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,948.20 : 589,422.30 = 126,717.40 : x
  2. Step 2: Convert to fraction form
    392,948.20/589,422.30 = 126,717.40/x
  3. Step 3: Cross multiply
    392,948.20x = 589,422.30 × 126,717.40
  4. Step 4: Simplify right side
    392,948.20x = 74,690,061,358.02
  5. Step 5: Solve for x
    x = 74,690,061,358.02/392,948.20
  6. Step 6: Final answer
    x = 190,076.10

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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.