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Finding the Fourth Proportional to 1,511.52, 2,085.84 and 882

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Solution

The fourth proportional to 1,511.52, 2,085.84 and 882 is: 1,217.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.52 : 2,085.84 = 882 : x
  2. Step 2: Convert to fraction form
    1,511.52/2,085.84 = 882/x
  3. Step 3: Cross multiply
    1,511.52x = 2,085.84 × 882
  4. Step 4: Simplify right side
    1,511.52x = 1,839,710.88
  5. Step 5: Solve for x
    x = 1,839,710.88/1,511.52
  6. Step 6: Final answer
    x = 1,217.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.