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Finding the Fourth Proportional to 278,879.80, 385,600.62 and 243,450.40

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Solution

The fourth proportional to 278,879.80, 385,600.62 and 243,450.40 is: 336,613.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,879.80 : 385,600.62 = 243,450.40 : x
  2. Step 2: Convert to fraction form
    278,879.80/385,600.62 = 243,450.40/x
  3. Step 3: Cross multiply
    278,879.80x = 385,600.62 × 243,450.40
  4. Step 4: Simplify right side
    278,879.80x = 93,874,625,179.25
  5. Step 5: Solve for x
    x = 93,874,625,179.25/278,879.80
  6. Step 6: Final answer
    x = 336,613.21

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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.