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Finding the Fourth Proportional to 852.38, 1,175.12 and 640.01

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Solution

The fourth proportional to 852.38, 1,175.12 and 640.01 is: 882.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.38 : 1,175.12 = 640.01 : x
  2. Step 2: Convert to fraction form
    852.38/1,175.12 = 640.01/x
  3. Step 3: Cross multiply
    852.38x = 1,175.12 × 640.01
  4. Step 4: Simplify right side
    852.38x = 752,084.28
  5. Step 5: Solve for x
    x = 752,084.28/852.38
  6. Step 6: Final answer
    x = 882.33

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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.