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Finding the Fourth Proportional to 278,314.88, 386,738.88 and 275,424.80

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Solution

The fourth proportional to 278,314.88, 386,738.88 and 275,424.80 is: 382,722.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,314.88 : 386,738.88 = 275,424.80 : x
  2. Step 2: Convert to fraction form
    278,314.88/386,738.88 = 275,424.80/x
  3. Step 3: Cross multiply
    278,314.88x = 386,738.88 × 275,424.80
  4. Step 4: Simplify right side
    278,314.88x = 106,517,478,676.22
  5. Step 5: Solve for x
    x = 106,517,478,676.22/278,314.88
  6. Step 6: Final answer
    x = 382,722.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.