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Finding the Fourth Proportional to 410,354.20, 615,531.30 and 408,021.40

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Solution

The fourth proportional to 410,354.20, 615,531.30 and 408,021.40 is: 612,032.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,354.20 : 615,531.30 = 408,021.40 : x
  2. Step 2: Convert to fraction form
    410,354.20/615,531.30 = 408,021.40/x
  3. Step 3: Cross multiply
    410,354.20x = 615,531.30 × 408,021.40
  4. Step 4: Simplify right side
    410,354.20x = 251,149,942,769.82
  5. Step 5: Solve for x
    x = 251,149,942,769.82/410,354.20
  6. Step 6: Final answer
    x = 612,032.10

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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.