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Finding the Fourth Proportional to 438,908.70, 658,363.05 and 368,049.90

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Solution

The fourth proportional to 438,908.70, 658,363.05 and 368,049.90 is: 552,074.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,908.70 : 658,363.05 = 368,049.90 : x
  2. Step 2: Convert to fraction form
    438,908.70/658,363.05 = 368,049.90/x
  3. Step 3: Cross multiply
    438,908.70x = 658,363.05 × 368,049.90
  4. Step 4: Simplify right side
    438,908.70x = 242,310,454,716.20
  5. Step 5: Solve for x
    x = 242,310,454,716.20/438,908.70
  6. Step 6: Final answer
    x = 552,074.85

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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.