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Finding the Fourth Proportional to 278,759.54, 384,657.31 and 154,577.39

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Solution

The fourth proportional to 278,759.54, 384,657.31 and 154,577.39 is: 213,299.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,759.54 : 384,657.31 = 154,577.39 : x
  2. Step 2: Convert to fraction form
    278,759.54/384,657.31 = 154,577.39/x
  3. Step 3: Cross multiply
    278,759.54x = 384,657.31 × 154,577.39
  4. Step 4: Simplify right side
    278,759.54x = 59,459,321,751.05
  5. Step 5: Solve for x
    x = 59,459,321,751.05/278,759.54
  6. Step 6: Final answer
    x = 213,299.69

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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.