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Finding the Fourth Proportional to 413,400.80, 620,101.20 and 407,871.20

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Solution

The fourth proportional to 413,400.80, 620,101.20 and 407,871.20 is: 611,806.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,400.80 : 620,101.20 = 407,871.20 : x
  2. Step 2: Convert to fraction form
    413,400.80/620,101.20 = 407,871.20/x
  3. Step 3: Cross multiply
    413,400.80x = 620,101.20 × 407,871.20
  4. Step 4: Simplify right side
    413,400.80x = 252,921,420,565.44
  5. Step 5: Solve for x
    x = 252,921,420,565.44/413,400.80
  6. Step 6: Final answer
    x = 611,806.80

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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.