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Finding the Fourth Proportional to 811.07, 1,217.01 and 325.07

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Solution

The fourth proportional to 811.07, 1,217.01 and 325.07 is: 487.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.07 : 1,217.01 = 325.07 : x
  2. Step 2: Convert to fraction form
    811.07/1,217.01 = 325.07/x
  3. Step 3: Cross multiply
    811.07x = 1,217.01 × 325.07
  4. Step 4: Simplify right side
    811.07x = 395,613.44
  5. Step 5: Solve for x
    x = 395,613.44/811.07
  6. Step 6: Final answer
    x = 487.77

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.