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Finding the Fourth Proportional to 268,991.70, 403,487.55 and 266,226.90

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Solution

The fourth proportional to 268,991.70, 403,487.55 and 266,226.90 is: 399,340.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,991.70 : 403,487.55 = 266,226.90 : x
  2. Step 2: Convert to fraction form
    268,991.70/403,487.55 = 266,226.90/x
  3. Step 3: Cross multiply
    268,991.70x = 403,487.55 × 266,226.90
  4. Step 4: Simplify right side
    268,991.70x = 107,419,239,625.10
  5. Step 5: Solve for x
    x = 107,419,239,625.10/268,991.70
  6. Step 6: Final answer
    x = 399,340.35

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1.5x scale

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.