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Finding the Fourth Proportional to 651.71, 976.86 and 261.92

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Solution

The fourth proportional to 651.71, 976.86 and 261.92 is: 392.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.71 : 976.86 = 261.92 : x
  2. Step 2: Convert to fraction form
    651.71/976.86 = 261.92/x
  3. Step 3: Cross multiply
    651.71x = 976.86 × 261.92
  4. Step 4: Simplify right side
    651.71x = 255,854.29
  5. Step 5: Solve for x
    x = 255,854.29/651.71
  6. Step 6: Final answer
    x = 392.59

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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.