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Finding the Fourth Proportional to 664,396.80, 996,692.40 and 215,041.20

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Solution

The fourth proportional to 664,396.80, 996,692.40 and 215,041.20 is: 322,593.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,396.80 : 996,692.40 = 215,041.20 : x
  2. Step 2: Convert to fraction form
    664,396.80/996,692.40 = 215,041.20/x
  3. Step 3: Cross multiply
    664,396.80x = 996,692.40 × 215,041.20
  4. Step 4: Simplify right side
    664,396.80x = 214,329,929,726.88
  5. Step 5: Solve for x
    x = 214,329,929,726.88/664,396.80
  6. Step 6: Final answer
    x = 322,593.26

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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.