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Finding the Fourth Proportional to 347.86, 523.52 and 261.64

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Solution

The fourth proportional to 347.86, 523.52 and 261.64 is: 393.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.86 : 523.52 = 261.64 : x
  2. Step 2: Convert to fraction form
    347.86/523.52 = 261.64/x
  3. Step 3: Cross multiply
    347.86x = 523.52 × 261.64
  4. Step 4: Simplify right side
    347.86x = 136,972.14
  5. Step 5: Solve for x
    x = 136,972.14/347.86
  6. Step 6: Final answer
    x = 393.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.