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Finding the Fourth Proportional to 416,385.80, 624,425.10 and 135,912.20

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Solution

The fourth proportional to 416,385.80, 624,425.10 and 135,912.20 is: 203,818.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    416,385.80 : 624,425.10 = 135,912.20 : x
  2. Step 2: Convert to fraction form
    416,385.80/624,425.10 = 135,912.20/x
  3. Step 3: Cross multiply
    416,385.80x = 624,425.10 × 135,912.20
  4. Step 4: Simplify right side
    416,385.80x = 84,866,989,076.22
  5. Step 5: Solve for x
    x = 84,866,989,076.22/416,385.80
  6. Step 6: Final answer
    x = 203,818.16

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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.