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Finding the Fourth Proportional to 1,266.70, 1,899.13 and 854.82

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Solution

The fourth proportional to 1,266.70, 1,899.13 and 854.82 is: 1,281.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.70 : 1,899.13 = 854.82 : x
  2. Step 2: Convert to fraction form
    1,266.70/1,899.13 = 854.82/x
  3. Step 3: Cross multiply
    1,266.70x = 1,899.13 × 854.82
  4. Step 4: Simplify right side
    1,266.70x = 1,623,414.31
  5. Step 5: Solve for x
    x = 1,623,414.31/1,266.70
  6. Step 6: Final answer
    x = 1,281.61

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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.