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Finding the Fourth Proportional to 278,591.78, 384,445.87 and 151,264.46

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Solution

The fourth proportional to 278,591.78, 384,445.87 and 151,264.46 is: 208,739.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,591.78 : 384,445.87 = 151,264.46 : x
  2. Step 2: Convert to fraction form
    278,591.78/384,445.87 = 151,264.46/x
  3. Step 3: Cross multiply
    278,591.78x = 384,445.87 × 151,264.46
  4. Step 4: Simplify right side
    278,591.78x = 58,152,995,002.55
  5. Step 5: Solve for x
    x = 58,152,995,002.55/278,591.78
  6. Step 6: Final answer
    x = 208,739.10

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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.