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Finding the Fourth Proportional to 412,644.57, 619,060.20 and 146,405.40

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Solution

The fourth proportional to 412,644.57, 619,060.20 and 146,405.40 is: 219,641.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,644.57 : 619,060.20 = 146,405.40 : x
  2. Step 2: Convert to fraction form
    412,644.57/619,060.20 = 146,405.40/x
  3. Step 3: Cross multiply
    412,644.57x = 619,060.20 × 146,405.40
  4. Step 4: Simplify right side
    412,644.57x = 90,633,756,205.08
  5. Step 5: Solve for x
    x = 90,633,756,205.08/412,644.57
  6. Step 6: Final answer
    x = 219,641.22

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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.