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Finding the Fourth Proportional to 418,899.33, 628,391.93 and 261,085.41

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Solution

The fourth proportional to 418,899.33, 628,391.93 and 261,085.41 is: 391,654.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,899.33 : 628,391.93 = 261,085.41 : x
  2. Step 2: Convert to fraction form
    418,899.33/628,391.93 = 261,085.41/x
  3. Step 3: Cross multiply
    418,899.33x = 628,391.93 × 261,085.41
  4. Step 4: Simplify right side
    418,899.33x = 164,063,963,379.31
  5. Step 5: Solve for x
    x = 164,063,963,379.31/418,899.33
  6. Step 6: Final answer
    x = 391,654.87

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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.