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Finding the Fourth Proportional to 278,987.60, 385,001.28 and 158,151.68

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Solution

The fourth proportional to 278,987.60, 385,001.28 and 158,151.68 is: 218,248.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,987.60 : 385,001.28 = 158,151.68 : x
  2. Step 2: Convert to fraction form
    278,987.60/385,001.28 = 158,151.68/x
  3. Step 3: Cross multiply
    278,987.60x = 385,001.28 × 158,151.68
  4. Step 4: Simplify right side
    278,987.60x = 60,888,599,234.15
  5. Step 5: Solve for x
    x = 60,888,599,234.15/278,987.60
  6. Step 6: Final answer
    x = 218,248.41

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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.