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Finding the Fourth Proportional to 867.21, 1,195.51 and 535.44

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Solution

The fourth proportional to 867.21, 1,195.51 and 535.44 is: 738.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.21 : 1,195.51 = 535.44 : x
  2. Step 2: Convert to fraction form
    867.21/1,195.51 = 535.44/x
  3. Step 3: Cross multiply
    867.21x = 1,195.51 × 535.44
  4. Step 4: Simplify right side
    867.21x = 640,128.02
  5. Step 5: Solve for x
    x = 640,128.02/867.21
  6. Step 6: Final answer
    x = 738.15

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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.