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Finding the Fourth Proportional to 976.86, 1,351.08 and 960.45

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Solution

The fourth proportional to 976.86, 1,351.08 and 960.45 is: 1,328.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.86 : 1,351.08 = 960.45 : x
  2. Step 2: Convert to fraction form
    976.86/1,351.08 = 960.45/x
  3. Step 3: Cross multiply
    976.86x = 1,351.08 × 960.45
  4. Step 4: Simplify right side
    976.86x = 1,297,644.79
  5. Step 5: Solve for x
    x = 1,297,644.79/976.86
  6. Step 6: Final answer
    x = 1,328.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.