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Finding the Fourth Proportional to 396,511.20, 594,766.80 and 130,280.40

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Solution

The fourth proportional to 396,511.20, 594,766.80 and 130,280.40 is: 195,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,511.20 : 594,766.80 = 130,280.40 : x
  2. Step 2: Convert to fraction form
    396,511.20/594,766.80 = 130,280.40/x
  3. Step 3: Cross multiply
    396,511.20x = 594,766.80 × 130,280.40
  4. Step 4: Simplify right side
    396,511.20x = 77,486,456,610.72
  5. Step 5: Solve for x
    x = 77,486,456,610.72/396,511.20
  6. Step 6: Final answer
    x = 195,420.60

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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.