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Finding the Fourth Proportional to 279,819.20, 419,728.80 and 92,830.70

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Solution

The fourth proportional to 279,819.20, 419,728.80 and 92,830.70 is: 139,246.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,819.20 : 419,728.80 = 92,830.70 : x
  2. Step 2: Convert to fraction form
    279,819.20/419,728.80 = 92,830.70/x
  3. Step 3: Cross multiply
    279,819.20x = 419,728.80 × 92,830.70
  4. Step 4: Simplify right side
    279,819.20x = 38,963,718,314.16
  5. Step 5: Solve for x
    x = 38,963,718,314.16/279,819.20
  6. Step 6: Final answer
    x = 139,246.05

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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.