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Finding the Fourth Proportional to 278,884.85, 384,864.08 and 151,560.45

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Solution

The fourth proportional to 278,884.85, 384,864.08 and 151,560.45 is: 209,155.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,884.85 : 384,864.08 = 151,560.45 : x
  2. Step 2: Convert to fraction form
    278,884.85/384,864.08 = 151,560.45/x
  3. Step 3: Cross multiply
    278,884.85x = 384,864.08 × 151,560.45
  4. Step 4: Simplify right side
    278,884.85x = 58,330,172,395.83
  5. Step 5: Solve for x
    x = 58,330,172,395.83/278,884.85
  6. Step 6: Final answer
    x = 209,155.05

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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.