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Finding the Fourth Proportional to 266,428.20, 399,447.90 and 108,575.40

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Solution

The fourth proportional to 266,428.20, 399,447.90 and 108,575.40 is: 162,783.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,428.20 : 399,447.90 = 108,575.40 : x
  2. Step 2: Convert to fraction form
    266,428.20/399,447.90 = 108,575.40/x
  3. Step 3: Cross multiply
    266,428.20x = 399,447.90 × 108,575.40
  4. Step 4: Simplify right side
    266,428.20x = 43,370,215,521.66
  5. Step 5: Solve for x
    x = 43,370,215,521.66/266,428.20
  6. Step 6: Final answer
    x = 162,783.88

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1.5x scale

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.