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Finding the Fourth Proportional to 221,490.30, 332,235.45 and 220,178.10

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Solution

The fourth proportional to 221,490.30, 332,235.45 and 220,178.10 is: 330,267.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,490.30 : 332,235.45 = 220,178.10 : x
  2. Step 2: Convert to fraction form
    221,490.30/332,235.45 = 220,178.10/x
  3. Step 3: Cross multiply
    221,490.30x = 332,235.45 × 220,178.10
  4. Step 4: Simplify right side
    221,490.30x = 73,150,970,133.65
  5. Step 5: Solve for x
    x = 73,150,970,133.65/221,490.30
  6. Step 6: Final answer
    x = 330,267.15

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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.