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Finding the Fourth Proportional to 278,892.61, 384,874.77 and 151,568.20

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Solution

The fourth proportional to 278,892.61, 384,874.77 and 151,568.20 is: 209,165.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,892.61 : 384,874.77 = 151,568.20 : x
  2. Step 2: Convert to fraction form
    278,892.61/384,874.77 = 151,568.20/x
  3. Step 3: Cross multiply
    278,892.61x = 384,874.77 × 151,568.20
  4. Step 4: Simplify right side
    278,892.61x = 58,334,776,114.31
  5. Step 5: Solve for x
    x = 58,334,776,114.31/278,892.61
  6. Step 6: Final answer
    x = 209,165.73

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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.