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Finding the Fourth Proportional to 266,428.60, 399,302.70 and 108,478.60

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Solution

The fourth proportional to 266,428.60, 399,302.70 and 108,478.60 is: 162,579.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,428.60 : 399,302.70 = 108,478.60 : x
  2. Step 2: Convert to fraction form
    266,428.60/399,302.70 = 108,478.60/x
  3. Step 3: Cross multiply
    266,428.60x = 399,302.70 × 108,478.60
  4. Step 4: Simplify right side
    266,428.60x = 43,315,797,872.22
  5. Step 5: Solve for x
    x = 43,315,797,872.22/266,428.60
  6. Step 6: Final answer
    x = 162,579.38

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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.