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Finding the Fourth Proportional to 278,707.20, 384,620.40 and 151,382.88

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Solution

The fourth proportional to 278,707.20, 384,620.40 and 151,382.88 is: 208,910.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,707.20 : 384,620.40 = 151,382.88 : x
  2. Step 2: Convert to fraction form
    278,707.20/384,620.40 = 151,382.88/x
  3. Step 3: Cross multiply
    278,707.20x = 384,620.40 × 151,382.88
  4. Step 4: Simplify right side
    278,707.20x = 58,224,943,858.75
  5. Step 5: Solve for x
    x = 58,224,943,858.75/278,707.20
  6. Step 6: Final answer
    x = 208,910.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.