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Finding the Fourth Proportional to 587.90, 810.94 and 388.73

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Solution

The fourth proportional to 587.90, 810.94 and 388.73 is: 536.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.90 : 810.94 = 388.73 : x
  2. Step 2: Convert to fraction form
    587.90/810.94 = 388.73/x
  3. Step 3: Cross multiply
    587.90x = 810.94 × 388.73
  4. Step 4: Simplify right side
    587.90x = 315,231.68
  5. Step 5: Solve for x
    x = 315,231.68/587.90
  6. Step 6: Final answer
    x = 536.20

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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.