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Finding the Fourth Proportional to 328,297.65, 492,105.05 and 138,599.70

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Solution

The fourth proportional to 328,297.65, 492,105.05 and 138,599.70 is: 207,755.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,297.65 : 492,105.05 = 138,599.70 : x
  2. Step 2: Convert to fraction form
    328,297.65/492,105.05 = 138,599.70/x
  3. Step 3: Cross multiply
    328,297.65x = 492,105.05 × 138,599.70
  4. Step 4: Simplify right side
    328,297.65x = 68,205,612,298.49
  5. Step 5: Solve for x
    x = 68,205,612,298.49/328,297.65
  6. Step 6: Final answer
    x = 207,755.41

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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.