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Finding the Fourth Proportional to 408,928.60, 613,392.90 and 259,337.80

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Solution

The fourth proportional to 408,928.60, 613,392.90 and 259,337.80 is: 389,006.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,928.60 : 613,392.90 = 259,337.80 : x
  2. Step 2: Convert to fraction form
    408,928.60/613,392.90 = 259,337.80/x
  3. Step 3: Cross multiply
    408,928.60x = 613,392.90 × 259,337.80
  4. Step 4: Simplify right side
    408,928.60x = 159,075,965,221.62
  5. Step 5: Solve for x
    x = 159,075,965,221.62/408,928.60
  6. Step 6: Final answer
    x = 389,006.70

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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.