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Finding the Fourth Proportional to 651, 976.31 and 260.85

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Solution

The fourth proportional to 651, 976.31 and 260.85 is: 391.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    651 : 976.31 = 260.85 : x
  2. Step 2: Convert to fraction form
    651/976.31 = 260.85/x
  3. Step 3: Cross multiply
    651x = 976.31 × 260.85
  4. Step 4: Simplify right side
    651x = 254,669.16
  5. Step 5: Solve for x
    x = 254,669.16/651
  6. Step 6: Final answer
    x = 391.20

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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.