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Finding the Fourth Proportional to 802.85, 1,204.36 and 217.86

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Solution

The fourth proportional to 802.85, 1,204.36 and 217.86 is: 326.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.85 : 1,204.36 = 217.86 : x
  2. Step 2: Convert to fraction form
    802.85/1,204.36 = 217.86/x
  3. Step 3: Cross multiply
    802.85x = 1,204.36 × 217.86
  4. Step 4: Simplify right side
    802.85x = 262,387.99
  5. Step 5: Solve for x
    x = 262,387.99/802.85
  6. Step 6: Final answer
    x = 326.82

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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.