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Finding the Fourth Proportional to 247,285.80, 370,928.70 and 218,745.45

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Solution

The fourth proportional to 247,285.80, 370,928.70 and 218,745.45 is: 328,118.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,285.80 : 370,928.70 = 218,745.45 : x
  2. Step 2: Convert to fraction form
    247,285.80/370,928.70 = 218,745.45/x
  3. Step 3: Cross multiply
    247,285.80x = 370,928.70 × 218,745.45
  4. Step 4: Simplify right side
    247,285.80x = 81,138,965,399.42
  5. Step 5: Solve for x
    x = 81,138,965,399.42/247,285.80
  6. Step 6: Final answer
    x = 328,118.18

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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.