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Finding the Fourth Proportional to 278,884.59, 384,863.18 and 151,560.21

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Solution

The fourth proportional to 278,884.59, 384,863.18 and 151,560.21 is: 209,154.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,884.59 : 384,863.18 = 151,560.21 : x
  2. Step 2: Convert to fraction form
    278,884.59/384,863.18 = 151,560.21/x
  3. Step 3: Cross multiply
    278,884.59x = 384,863.18 × 151,560.21
  4. Step 4: Simplify right side
    278,884.59x = 58,329,943,624.27
  5. Step 5: Solve for x
    x = 58,329,943,624.27/278,884.59
  6. Step 6: Final answer
    x = 209,154.42

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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.