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Finding the Fourth Proportional to 404,438.80, 606,658.20 and 328,331.20

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Solution

The fourth proportional to 404,438.80, 606,658.20 and 328,331.20 is: 492,496.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,438.80 : 606,658.20 = 328,331.20 : x
  2. Step 2: Convert to fraction form
    404,438.80/606,658.20 = 328,331.20/x
  3. Step 3: Cross multiply
    404,438.80x = 606,658.20 × 328,331.20
  4. Step 4: Simplify right side
    404,438.80x = 199,184,814,795.84
  5. Step 5: Solve for x
    x = 199,184,814,795.84/404,438.80
  6. Step 6: Final answer
    x = 492,496.80

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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.