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Finding the Fourth Proportional to 869.49, 1,303.92 and 252.99

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Solution

The fourth proportional to 869.49, 1,303.92 and 252.99 is: 379.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.49 : 1,303.92 = 252.99 : x
  2. Step 2: Convert to fraction form
    869.49/1,303.92 = 252.99/x
  3. Step 3: Cross multiply
    869.49x = 1,303.92 × 252.99
  4. Step 4: Simplify right side
    869.49x = 329,878.72
  5. Step 5: Solve for x
    x = 329,878.72/869.49
  6. Step 6: Final answer
    x = 379.39

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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.