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Finding the Fourth Proportional to 691,885.62, 954,311.49 and 449,721.54

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Solution

The fourth proportional to 691,885.62, 954,311.49 and 449,721.54 is: 620,296.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,885.62 : 954,311.49 = 449,721.54 : x
  2. Step 2: Convert to fraction form
    691,885.62/954,311.49 = 449,721.54/x
  3. Step 3: Cross multiply
    691,885.62x = 954,311.49 × 449,721.54
  4. Step 4: Simplify right side
    691,885.62x = 429,174,432,922.50
  5. Step 5: Solve for x
    x = 429,174,432,922.50/691,885.62
  6. Step 6: Final answer
    x = 620,296.80

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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.