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Finding the Fourth Proportional to 266,998.40, 399,914.40 and 207,366.20

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Solution

The fourth proportional to 266,998.40, 399,914.40 and 207,366.20 is: 310,596.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,998.40 : 399,914.40 = 207,366.20 : x
  2. Step 2: Convert to fraction form
    266,998.40/399,914.40 = 207,366.20/x
  3. Step 3: Cross multiply
    266,998.40x = 399,914.40 × 207,366.20
  4. Step 4: Simplify right side
    266,998.40x = 82,928,729,453.28
  5. Step 5: Solve for x
    x = 82,928,729,453.28/266,998.40
  6. Step 6: Final answer
    x = 310,596.35

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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.