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Finding the Fourth Proportional to 299,670.91, 449,355.88 and 99,920.59

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Solution

The fourth proportional to 299,670.91, 449,355.88 and 99,920.59 is: 149,830.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,670.91 : 449,355.88 = 99,920.59 : x
  2. Step 2: Convert to fraction form
    299,670.91/449,355.88 = 99,920.59/x
  3. Step 3: Cross multiply
    299,670.91x = 449,355.88 × 99,920.59
  4. Step 4: Simplify right side
    299,670.91x = 44,899,904,649.57
  5. Step 5: Solve for x
    x = 44,899,904,649.57/299,670.91
  6. Step 6: Final answer
    x = 149,830.71

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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.