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Finding the Fourth Proportional to 266,218.30, 399,436.80 and 97,819.30

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Solution

The fourth proportional to 266,218.30, 399,436.80 and 97,819.30 is: 146,769.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,218.30 : 399,436.80 = 97,819.30 : x
  2. Step 2: Convert to fraction form
    266,218.30/399,436.80 = 97,819.30/x
  3. Step 3: Cross multiply
    266,218.30x = 399,436.80 × 97,819.30
  4. Step 4: Simplify right side
    266,218.30x = 39,072,628,170.24
  5. Step 5: Solve for x
    x = 39,072,628,170.24/266,218.30
  6. Step 6: Final answer
    x = 146,769.13

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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.