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Finding the Fourth Proportional to 535.31, 802.94 and 261.42

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Solution

The fourth proportional to 535.31, 802.94 and 261.42 is: 392.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.31 : 802.94 = 261.42 : x
  2. Step 2: Convert to fraction form
    535.31/802.94 = 261.42/x
  3. Step 3: Cross multiply
    535.31x = 802.94 × 261.42
  4. Step 4: Simplify right side
    535.31x = 209,903.27
  5. Step 5: Solve for x
    x = 209,903.27/535.31
  6. Step 6: Final answer
    x = 392.12

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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.