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Finding the Fourth Proportional to 266,387.13, 399,728.32 and 108,603.38

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Solution

The fourth proportional to 266,387.13, 399,728.32 and 108,603.38 is: 162,965.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,387.13 : 399,728.32 = 108,603.38 : x
  2. Step 2: Convert to fraction form
    266,387.13/399,728.32 = 108,603.38/x
  3. Step 3: Cross multiply
    266,387.13x = 399,728.32 × 108,603.38
  4. Step 4: Simplify right side
    266,387.13x = 43,411,847,361.53
  5. Step 5: Solve for x
    x = 43,411,847,361.53/266,387.13
  6. Step 6: Final answer
    x = 162,965.26

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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.