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Finding the Fourth Proportional to 1,266.21, 1,898.82 and 525.95

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Solution

The fourth proportional to 1,266.21, 1,898.82 and 525.95 is: 788.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.21 : 1,898.82 = 525.95 : x
  2. Step 2: Convert to fraction form
    1,266.21/1,898.82 = 525.95/x
  3. Step 3: Cross multiply
    1,266.21x = 1,898.82 × 525.95
  4. Step 4: Simplify right side
    1,266.21x = 998,674.88
  5. Step 5: Solve for x
    x = 998,674.88/1,266.21
  6. Step 6: Final answer
    x = 788.71

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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.