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Finding the Fourth Proportional to 641,617.20, 962,425.80 and 326,689.20

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Solution

The fourth proportional to 641,617.20, 962,425.80 and 326,689.20 is: 490,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,617.20 : 962,425.80 = 326,689.20 : x
  2. Step 2: Convert to fraction form
    641,617.20/962,425.80 = 326,689.20/x
  3. Step 3: Cross multiply
    641,617.20x = 962,425.80 × 326,689.20
  4. Step 4: Simplify right side
    641,617.20x = 314,414,114,661.36
  5. Step 5: Solve for x
    x = 314,414,114,661.36/641,617.20
  6. Step 6: Final answer
    x = 490,033.80

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Similar ratio
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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.