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Finding the Fourth Proportional to 644,987.28, 890,093.13 and 354,611.13

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Solution

The fourth proportional to 644,987.28, 890,093.13 and 354,611.13 is: 489,369.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,987.28 : 890,093.13 = 354,611.13 : x
  2. Step 2: Convert to fraction form
    644,987.28/890,093.13 = 354,611.13/x
  3. Step 3: Cross multiply
    644,987.28x = 890,093.13 × 354,611.13
  4. Step 4: Simplify right side
    644,987.28x = 315,636,930,634.54
  5. Step 5: Solve for x
    x = 315,636,930,634.54/644,987.28
  6. Step 6: Final answer
    x = 489,369.23

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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.