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Finding the Fourth Proportional to 664,084.80, 916,515.60 and 377,647.92

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Solution

The fourth proportional to 664,084.80, 916,515.60 and 377,647.92 is: 521,198.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,084.80 : 916,515.60 = 377,647.92 : x
  2. Step 2: Convert to fraction form
    664,084.80/916,515.60 = 377,647.92/x
  3. Step 3: Cross multiply
    664,084.80x = 916,515.60 × 377,647.92
  4. Step 4: Simplify right side
    664,084.80x = 346,120,209,987.55
  5. Step 5: Solve for x
    x = 346,120,209,987.55/664,084.80
  6. Step 6: Final answer
    x = 521,198.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.