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Finding the Fourth Proportional to 353.02, 529.78 and 261.96

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Solution

The fourth proportional to 353.02, 529.78 and 261.96 is: 393.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.02 : 529.78 = 261.96 : x
  2. Step 2: Convert to fraction form
    353.02/529.78 = 261.96/x
  3. Step 3: Cross multiply
    353.02x = 529.78 × 261.96
  4. Step 4: Simplify right side
    353.02x = 138,781.17
  5. Step 5: Solve for x
    x = 138,781.17/353.02
  6. Step 6: Final answer
    x = 393.13

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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.