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Finding the Fourth Proportional to 851.26, 1,173.54 and 641.48

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Solution

The fourth proportional to 851.26, 1,173.54 and 641.48 is: 884.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.26 : 1,173.54 = 641.48 : x
  2. Step 2: Convert to fraction form
    851.26/1,173.54 = 641.48/x
  3. Step 3: Cross multiply
    851.26x = 1,173.54 × 641.48
  4. Step 4: Simplify right side
    851.26x = 752,802.44
  5. Step 5: Solve for x
    x = 752,802.44/851.26
  6. Step 6: Final answer
    x = 884.34

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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.