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Finding the Fourth Proportional to 587.90, 811.22 and 351.83

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Solution

The fourth proportional to 587.90, 811.22 and 351.83 is: 485.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.90 : 811.22 = 351.83 : x
  2. Step 2: Convert to fraction form
    587.90/811.22 = 351.83/x
  3. Step 3: Cross multiply
    587.90x = 811.22 × 351.83
  4. Step 4: Simplify right side
    587.90x = 285,411.80
  5. Step 5: Solve for x
    x = 285,411.80/587.90
  6. Step 6: Final answer
    x = 485.47

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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.