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Finding the Fourth Proportional to 278,735.95, 384,666.17 and 156,230.58

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Solution

The fourth proportional to 278,735.95, 384,666.17 and 156,230.58 is: 215,604.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,735.95 : 384,666.17 = 156,230.58 : x
  2. Step 2: Convert to fraction form
    278,735.95/384,666.17 = 156,230.58/x
  3. Step 3: Cross multiply
    278,735.95x = 384,666.17 × 156,230.58
  4. Step 4: Simplify right side
    278,735.95x = 60,096,618,845.48
  5. Step 5: Solve for x
    x = 60,096,618,845.48/278,735.95
  6. Step 6: Final answer
    x = 215,604.12

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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.