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Finding the Fourth Proportional to 408,548.06, 612,822.27 and 128,087.18

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Solution

The fourth proportional to 408,548.06, 612,822.27 and 128,087.18 is: 192,130.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,548.06 : 612,822.27 = 128,087.18 : x
  2. Step 2: Convert to fraction form
    408,548.06/612,822.27 = 128,087.18/x
  3. Step 3: Cross multiply
    408,548.06x = 612,822.27 × 128,087.18
  4. Step 4: Simplify right side
    408,548.06x = 78,494,676,405.50
  5. Step 5: Solve for x
    x = 78,494,676,405.50/408,548.06
  6. Step 6: Final answer
    x = 192,130.83

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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.