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Finding the Fourth Proportional to 408,012.20, 611,420.70 and 365,892.20

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Solution

The fourth proportional to 408,012.20, 611,420.70 and 365,892.20 is: 548,302.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,012.20 : 611,420.70 = 365,892.20 : x
  2. Step 2: Convert to fraction form
    408,012.20/611,420.70 = 365,892.20/x
  3. Step 3: Cross multiply
    408,012.20x = 611,420.70 × 365,892.20
  4. Step 4: Simplify right side
    408,012.20x = 223,714,065,048.54
  5. Step 5: Solve for x
    x = 223,714,065,048.54/408,012.20
  6. Step 6: Final answer
    x = 548,302.39

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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.