Home / 278,845.38-384,775.39-157,960.78

Finding the Fourth Proportional to 278,845.38, 384,775.39 and 157,960.78

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Solution

The fourth proportional to 278,845.38, 384,775.39 and 157,960.78 is: 217,968.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,845.38 : 384,775.39 = 157,960.78 : x
  2. Step 2: Convert to fraction form
    278,845.38/384,775.39 = 157,960.78/x
  3. Step 3: Cross multiply
    278,845.38x = 384,775.39 × 157,960.78
  4. Step 4: Simplify right side
    278,845.38x = 60,779,419,964.72
  5. Step 5: Solve for x
    x = 60,779,419,964.72/278,845.38
  6. Step 6: Final answer
    x = 217,968.18

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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.