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Finding the Fourth Proportional to 278,763.64, 384,694.28 and 151,439.33

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Solution

The fourth proportional to 278,763.64, 384,694.28 and 151,439.33 is: 208,986.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,763.64 : 384,694.28 = 151,439.33 : x
  2. Step 2: Convert to fraction form
    278,763.64/384,694.28 = 151,439.33/x
  3. Step 3: Cross multiply
    278,763.64x = 384,694.28 × 151,439.33
  4. Step 4: Simplify right side
    278,763.64x = 58,257,844,790.47
  5. Step 5: Solve for x
    x = 58,257,844,790.47/278,763.64
  6. Step 6: Final answer
    x = 208,986.53

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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.