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Finding the Fourth Proportional to 408,520.80, 611,614.80 and 314,431.20

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Solution

The fourth proportional to 408,520.80, 611,614.80 and 314,431.20 is: 470,749.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,520.80 : 611,614.80 = 314,431.20 : x
  2. Step 2: Convert to fraction form
    408,520.80/611,614.80 = 314,431.20/x
  3. Step 3: Cross multiply
    408,520.80x = 611,614.80 × 314,431.20
  4. Step 4: Simplify right side
    408,520.80x = 192,310,775,501.76
  5. Step 5: Solve for x
    x = 192,310,775,501.76/408,520.80
  6. Step 6: Final answer
    x = 470,749.04

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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.