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Finding the Fourth Proportional to 652.15, 976.87 and 391.33

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Solution

The fourth proportional to 652.15, 976.87 and 391.33 is: 586.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.15 : 976.87 = 391.33 : x
  2. Step 2: Convert to fraction form
    652.15/976.87 = 391.33/x
  3. Step 3: Cross multiply
    652.15x = 976.87 × 391.33
  4. Step 4: Simplify right side
    652.15x = 382,278.54
  5. Step 5: Solve for x
    x = 382,278.54/652.15
  6. Step 6: Final answer
    x = 586.18

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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.