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Finding the Fourth Proportional to 639,562.40, 959,084.40 and 218,621.60

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Solution

The fourth proportional to 639,562.40, 959,084.40 and 218,621.60 is: 327,843.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,562.40 : 959,084.40 = 218,621.60 : x
  2. Step 2: Convert to fraction form
    639,562.40/959,084.40 = 218,621.60/x
  3. Step 3: Cross multiply
    639,562.40x = 959,084.40 × 218,621.60
  4. Step 4: Simplify right side
    639,562.40x = 209,676,566,063.04
  5. Step 5: Solve for x
    x = 209,676,566,063.04/639,562.40
  6. Step 6: Final answer
    x = 327,843.80

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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.