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Finding the Fourth Proportional to 666,429.30, 998,769.15 and 266,742.90

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Solution

The fourth proportional to 666,429.30, 998,769.15 and 266,742.90 is: 399,764.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,429.30 : 998,769.15 = 266,742.90 : x
  2. Step 2: Convert to fraction form
    666,429.30/998,769.15 = 266,742.90/x
  3. Step 3: Cross multiply
    666,429.30x = 998,769.15 × 266,742.90
  4. Step 4: Simplify right side
    666,429.30x = 266,414,579,501.54
  5. Step 5: Solve for x
    x = 266,414,579,501.54/666,429.30
  6. Step 6: Final answer
    x = 399,764.21

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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.