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Finding the Fourth Proportional to 1,584.38, 2,186.51 and 885.75

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Solution

The fourth proportional to 1,584.38, 2,186.51 and 885.75 is: 1,222.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,584.38 : 2,186.51 = 885.75 : x
  2. Step 2: Convert to fraction form
    1,584.38/2,186.51 = 885.75/x
  3. Step 3: Cross multiply
    1,584.38x = 2,186.51 × 885.75
  4. Step 4: Simplify right side
    1,584.38x = 1,936,696.80
  5. Step 5: Solve for x
    x = 1,936,696.80/1,584.38
  6. Step 6: Final answer
    x = 1,222.37

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Half scale
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Double scale
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1.5x scale

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.