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Finding the Fourth Proportional to 644,987.54, 890,093.46 and 354,611.38

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Solution

The fourth proportional to 644,987.54, 890,093.46 and 354,611.38 is: 489,369.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,987.54 : 890,093.46 = 354,611.38 : x
  2. Step 2: Convert to fraction form
    644,987.54/890,093.46 = 354,611.38/x
  3. Step 3: Cross multiply
    644,987.54x = 890,093.46 × 354,611.38
  4. Step 4: Simplify right side
    644,987.54x = 315,637,270,179.58
  5. Step 5: Solve for x
    x = 315,637,270,179.58/644,987.54
  6. Step 6: Final answer
    x = 489,369.56

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1.5x scale

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.