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Finding the Fourth Proportional to 644,121.61, 888,997.16 and 372,347.05

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Solution

The fourth proportional to 644,121.61, 888,997.16 and 372,347.05 is: 513,902.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,121.61 : 888,997.16 = 372,347.05 : x
  2. Step 2: Convert to fraction form
    644,121.61/888,997.16 = 372,347.05/x
  3. Step 3: Cross multiply
    644,121.61x = 888,997.16 × 372,347.05
  4. Step 4: Simplify right side
    644,121.61x = 331,015,469,984.38
  5. Step 5: Solve for x
    x = 331,015,469,984.38/644,121.61
  6. Step 6: Final answer
    x = 513,902.13

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Double scale
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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.