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Finding the Fourth Proportional to 410,340.80, 615,511.20 and 321,867.20

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Solution

The fourth proportional to 410,340.80, 615,511.20 and 321,867.20 is: 482,800.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,340.80 : 615,511.20 = 321,867.20 : x
  2. Step 2: Convert to fraction form
    410,340.80/615,511.20 = 321,867.20/x
  3. Step 3: Cross multiply
    410,340.80x = 615,511.20 × 321,867.20
  4. Step 4: Simplify right side
    410,340.80x = 198,112,866,512.64
  5. Step 5: Solve for x
    x = 198,112,866,512.64/410,340.80
  6. Step 6: Final answer
    x = 482,800.80

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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.