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Finding the Fourth Proportional to 587.72, 811.22 and 401.52

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Solution

The fourth proportional to 587.72, 811.22 and 401.52 is: 554.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.72 : 811.22 = 401.52 : x
  2. Step 2: Convert to fraction form
    587.72/811.22 = 401.52/x
  3. Step 3: Cross multiply
    587.72x = 811.22 × 401.52
  4. Step 4: Simplify right side
    587.72x = 325,721.05
  5. Step 5: Solve for x
    x = 325,721.05/587.72
  6. Step 6: Final answer
    x = 554.21

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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.