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Finding the Fourth Proportional to 278,891.87, 384,873.20 and 151,567.49

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Solution

The fourth proportional to 278,891.87, 384,873.20 and 151,567.49 is: 209,164.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,891.87 : 384,873.20 = 151,567.49 : x
  2. Step 2: Convert to fraction form
    278,891.87/384,873.20 = 151,567.49/x
  3. Step 3: Cross multiply
    278,891.87x = 384,873.20 × 151,567.49
  4. Step 4: Simplify right side
    278,891.87x = 58,334,264,892.27
  5. Step 5: Solve for x
    x = 58,334,264,892.27/278,891.87
  6. Step 6: Final answer
    x = 209,164.45

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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.