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Finding the Fourth Proportional to 266,385.89, 399,579.10 and 74,252.64

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Solution

The fourth proportional to 266,385.89, 399,579.10 and 74,252.64 is: 111,379.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,385.89 : 399,579.10 = 74,252.64 : x
  2. Step 2: Convert to fraction form
    266,385.89/399,579.10 = 74,252.64/x
  3. Step 3: Cross multiply
    266,385.89x = 399,579.10 × 74,252.64
  4. Step 4: Simplify right side
    266,385.89x = 29,669,803,877.14
  5. Step 5: Solve for x
    x = 29,669,803,877.14/266,385.89
  6. Step 6: Final answer
    x = 111,379.04

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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.