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Finding the Fourth Proportional to 278,441.80, 417,662.70 and 91,453.30

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Solution

The fourth proportional to 278,441.80, 417,662.70 and 91,453.30 is: 137,179.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,441.80 : 417,662.70 = 91,453.30 : x
  2. Step 2: Convert to fraction form
    278,441.80/417,662.70 = 91,453.30/x
  3. Step 3: Cross multiply
    278,441.80x = 417,662.70 × 91,453.30
  4. Step 4: Simplify right side
    278,441.80x = 38,196,632,201.91
  5. Step 5: Solve for x
    x = 38,196,632,201.91/278,441.80
  6. Step 6: Final answer
    x = 137,179.95

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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.