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Finding the Fourth Proportional to 278,963.54, 384,987.57 and 156,467.42

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Solution

The fourth proportional to 278,963.54, 384,987.57 and 156,467.42 is: 215,935.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,963.54 : 384,987.57 = 156,467.42 : x
  2. Step 2: Convert to fraction form
    278,963.54/384,987.57 = 156,467.42/x
  3. Step 3: Cross multiply
    278,963.54x = 384,987.57 × 156,467.42
  4. Step 4: Simplify right side
    278,963.54x = 60,238,011,809.97
  5. Step 5: Solve for x
    x = 60,238,011,809.97/278,963.54
  6. Step 6: Final answer
    x = 215,935.07

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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.