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Finding the Fourth Proportional to 279,121.80, 418,682.70 and 266,291.40

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Solution

The fourth proportional to 279,121.80, 418,682.70 and 266,291.40 is: 399,437.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,121.80 : 418,682.70 = 266,291.40 : x
  2. Step 2: Convert to fraction form
    279,121.80/418,682.70 = 266,291.40/x
  3. Step 3: Cross multiply
    279,121.80x = 418,682.70 × 266,291.40
  4. Step 4: Simplify right side
    279,121.80x = 111,491,602,338.78
  5. Step 5: Solve for x
    x = 111,491,602,338.78/279,121.80
  6. Step 6: Final answer
    x = 399,437.10

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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.