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Finding the Fourth Proportional to 278,843.98, 384,803.36 and 157,985.04

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Solution

The fourth proportional to 278,843.98, 384,803.36 and 157,985.04 is: 218,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,843.98 : 384,803.36 = 157,985.04 : x
  2. Step 2: Convert to fraction form
    278,843.98/384,803.36 = 157,985.04/x
  3. Step 3: Cross multiply
    278,843.98x = 384,803.36 × 157,985.04
  4. Step 4: Simplify right side
    278,843.98x = 60,793,174,221.73
  5. Step 5: Solve for x
    x = 60,793,174,221.73/278,843.98
  6. Step 6: Final answer
    x = 218,018.60

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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.