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Finding the Fourth Proportional to 412,991.60, 619,487.40 and 163,641.20

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Solution

The fourth proportional to 412,991.60, 619,487.40 and 163,641.20 is: 245,461.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,991.60 : 619,487.40 = 163,641.20 : x
  2. Step 2: Convert to fraction form
    412,991.60/619,487.40 = 163,641.20/x
  3. Step 3: Cross multiply
    412,991.60x = 619,487.40 × 163,641.20
  4. Step 4: Simplify right side
    412,991.60x = 101,373,661,520.88
  5. Step 5: Solve for x
    x = 101,373,661,520.88/412,991.60
  6. Step 6: Final answer
    x = 245,461.80

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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.