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Finding the Fourth Proportional to 1,584, 2,185.92 and 885.38

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Solution

The fourth proportional to 1,584, 2,185.92 and 885.38 is: 1,221.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,584 : 2,185.92 = 885.38 : x
  2. Step 2: Convert to fraction form
    1,584/2,185.92 = 885.38/x
  3. Step 3: Cross multiply
    1,584x = 2,185.92 × 885.38
  4. Step 4: Simplify right side
    1,584x = 1,935,358.92
  5. Step 5: Solve for x
    x = 1,935,358.92/1,584
  6. Step 6: Final answer
    x = 1,221.82

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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.