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Finding the Fourth Proportional to 666,049.80, 998,811.70 and 266,616.12

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Solution

The fourth proportional to 666,049.80, 998,811.70 and 266,616.12 is: 399,818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,049.80 : 998,811.70 = 266,616.12 : x
  2. Step 2: Convert to fraction form
    666,049.80/998,811.70 = 266,616.12/x
  3. Step 3: Cross multiply
    666,049.80x = 998,811.70 × 266,616.12
  4. Step 4: Simplify right side
    666,049.80x = 266,299,300,064.60
  5. Step 5: Solve for x
    x = 266,299,300,064.60/666,049.80
  6. Step 6: Final answer
    x = 399,818.90

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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.