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Finding the Fourth Proportional to 662,121, 993,377.34 and 381,839.40

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Solution

The fourth proportional to 662,121, 993,377.34 and 381,839.40 is: 572,872.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,121 : 993,377.34 = 381,839.40 : x
  2. Step 2: Convert to fraction form
    662,121/993,377.34 = 381,839.40/x
  3. Step 3: Cross multiply
    662,121x = 993,377.34 × 381,839.40
  4. Step 4: Simplify right side
    662,121x = 379,310,607,479.20
  5. Step 5: Solve for x
    x = 379,310,607,479.20/662,121
  6. Step 6: Final answer
    x = 572,872.04

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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.