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Finding the Fourth Proportional to 408,521.20, 612,125.70 and 384,901.60

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Solution

The fourth proportional to 408,521.20, 612,125.70 and 384,901.60 is: 576,734.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,521.20 : 612,125.70 = 384,901.60 : x
  2. Step 2: Convert to fraction form
    408,521.20/612,125.70 = 384,901.60/x
  3. Step 3: Cross multiply
    408,521.20x = 612,125.70 × 384,901.60
  4. Step 4: Simplify right side
    408,521.20x = 235,608,161,331.12
  5. Step 5: Solve for x
    x = 235,608,161,331.12/408,521.20
  6. Step 6: Final answer
    x = 576,734.23

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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.