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Finding the Fourth Proportional to 535.22, 802.38 and 261.17

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Solution

The fourth proportional to 535.22, 802.38 and 261.17 is: 391.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.22 : 802.38 = 261.17 : x
  2. Step 2: Convert to fraction form
    535.22/802.38 = 261.17/x
  3. Step 3: Cross multiply
    535.22x = 802.38 × 261.17
  4. Step 4: Simplify right side
    535.22x = 209,557.58
  5. Step 5: Solve for x
    x = 209,557.58/535.22
  6. Step 6: Final answer
    x = 391.54

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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.