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Finding the Fourth Proportional to 279,520.60, 419,280.90 and 257,869.30

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Solution

The fourth proportional to 279,520.60, 419,280.90 and 257,869.30 is: 386,803.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,520.60 : 419,280.90 = 257,869.30 : x
  2. Step 2: Convert to fraction form
    279,520.60/419,280.90 = 257,869.30/x
  3. Step 3: Cross multiply
    279,520.60x = 419,280.90 × 257,869.30
  4. Step 4: Simplify right side
    279,520.60x = 108,119,672,186.37
  5. Step 5: Solve for x
    x = 108,119,672,186.37/279,520.60
  6. Step 6: Final answer
    x = 386,803.95

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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.