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Finding the Fourth Proportional to 392,949.74, 589,423.84 and 108,639.57

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Solution

The fourth proportional to 392,949.74, 589,423.84 and 108,639.57 is: 162,959.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,949.74 : 589,423.84 = 108,639.57 : x
  2. Step 2: Convert to fraction form
    392,949.74/589,423.84 = 108,639.57/x
  3. Step 3: Cross multiply
    392,949.74x = 589,423.84 × 108,639.57
  4. Step 4: Simplify right side
    392,949.74x = 64,034,750,319.70
  5. Step 5: Solve for x
    x = 64,034,750,319.70/392,949.74
  6. Step 6: Final answer
    x = 162,959.14

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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.