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Finding the Fourth Proportional to 1,266.22, 1,898.65 and 486.46

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Solution

The fourth proportional to 1,266.22, 1,898.65 and 486.46 is: 729.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.22 : 1,898.65 = 486.46 : x
  2. Step 2: Convert to fraction form
    1,266.22/1,898.65 = 486.46/x
  3. Step 3: Cross multiply
    1,266.22x = 1,898.65 × 486.46
  4. Step 4: Simplify right side
    1,266.22x = 923,617.28
  5. Step 5: Solve for x
    x = 923,617.28/1,266.22
  6. Step 6: Final answer
    x = 729.43

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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.