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Finding the Fourth Proportional to 266,415.90, 399,672.45 and 108,660.30

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Solution

The fourth proportional to 266,415.90, 399,672.45 and 108,660.30 is: 163,010.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,415.90 : 399,672.45 = 108,660.30 : x
  2. Step 2: Convert to fraction form
    266,415.90/399,672.45 = 108,660.30/x
  3. Step 3: Cross multiply
    266,415.90x = 399,672.45 × 108,660.30
  4. Step 4: Simplify right side
    266,415.90x = 43,428,528,318.74
  5. Step 5: Solve for x
    x = 43,428,528,318.74/266,415.90
  6. Step 6: Final answer
    x = 163,010.27

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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.