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Finding the Fourth Proportional to 278,766.06, 384,483.11 and 187,978.22

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Solution

The fourth proportional to 278,766.06, 384,483.11 and 187,978.22 is: 259,265.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,766.06 : 384,483.11 = 187,978.22 : x
  2. Step 2: Convert to fraction form
    278,766.06/384,483.11 = 187,978.22/x
  3. Step 3: Cross multiply
    278,766.06x = 384,483.11 × 187,978.22
  4. Step 4: Simplify right side
    278,766.06x = 72,274,449,217.37
  5. Step 5: Solve for x
    x = 72,274,449,217.37/278,766.06
  6. Step 6: Final answer
    x = 259,265.60

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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.