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Finding the Fourth Proportional to 278,359.20, 417,538.80 and 120,895.20

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Solution

The fourth proportional to 278,359.20, 417,538.80 and 120,895.20 is: 181,342.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,359.20 : 417,538.80 = 120,895.20 : x
  2. Step 2: Convert to fraction form
    278,359.20/417,538.80 = 120,895.20/x
  3. Step 3: Cross multiply
    278,359.20x = 417,538.80 × 120,895.20
  4. Step 4: Simplify right side
    278,359.20x = 50,478,436,733.76
  5. Step 5: Solve for x
    x = 50,478,436,733.76/278,359.20
  6. Step 6: Final answer
    x = 181,342.80

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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.