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Finding the Fourth Proportional to 664,245.52, 916,679 and 377,806.80

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Solution

The fourth proportional to 664,245.52, 916,679 and 377,806.80 is: 521,384.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,245.52 : 916,679 = 377,806.80 : x
  2. Step 2: Convert to fraction form
    664,245.52/916,679 = 377,806.80/x
  3. Step 3: Cross multiply
    664,245.52x = 916,679 × 377,806.80
  4. Step 4: Simplify right side
    664,245.52x = 346,327,559,617.20
  5. Step 5: Solve for x
    x = 346,327,559,617.20/664,245.52
  6. Step 6: Final answer
    x = 521,384.86

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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.