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Finding the Fourth Proportional to 408,562.56, 612,843.84 and 128,102.40

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Solution

The fourth proportional to 408,562.56, 612,843.84 and 128,102.40 is: 192,153.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,562.56 : 612,843.84 = 128,102.40 : x
  2. Step 2: Convert to fraction form
    408,562.56/612,843.84 = 128,102.40/x
  3. Step 3: Cross multiply
    408,562.56x = 612,843.84 × 128,102.40
  4. Step 4: Simplify right side
    408,562.56x = 78,506,766,729.22
  5. Step 5: Solve for x
    x = 78,506,766,729.22/408,562.56
  6. Step 6: Final answer
    x = 192,153.60

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1.5x scale

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.