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Finding the Fourth Proportional to 278,888.60, 384,851.53 and 158,031.33

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Solution

The fourth proportional to 278,888.60, 384,851.53 and 158,031.33 is: 218,074.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,888.60 : 384,851.53 = 158,031.33 : x
  2. Step 2: Convert to fraction form
    278,888.60/384,851.53 = 158,031.33/x
  3. Step 3: Cross multiply
    278,888.60x = 384,851.53 × 158,031.33
  4. Step 4: Simplify right side
    278,888.60x = 60,818,599,138.43
  5. Step 5: Solve for x
    x = 60,818,599,138.43/278,888.60
  6. Step 6: Final answer
    x = 218,074.88

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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.