Home / 278,905.87-418,257.55-152,639.43

Finding the Fourth Proportional to 278,905.87, 418,257.55 and 152,639.43

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Solution

The fourth proportional to 278,905.87, 418,257.55 and 152,639.43 is: 228,903.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,905.87 : 418,257.55 = 152,639.43 : x
  2. Step 2: Convert to fraction form
    278,905.87/418,257.55 = 152,639.43/x
  3. Step 3: Cross multiply
    278,905.87x = 418,257.55 × 152,639.43
  4. Step 4: Simplify right side
    278,905.87x = 63,842,594,025.20
  5. Step 5: Solve for x
    x = 63,842,594,025.20/278,905.87
  6. Step 6: Final answer
    x = 228,903.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.