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Finding the Fourth Proportional to 976.20, 1,344.24 and 835.28

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Solution

The fourth proportional to 976.20, 1,344.24 and 835.28 is: 1,150.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.20 : 1,344.24 = 835.28 : x
  2. Step 2: Convert to fraction form
    976.20/1,344.24 = 835.28/x
  3. Step 3: Cross multiply
    976.20x = 1,344.24 × 835.28
  4. Step 4: Simplify right side
    976.20x = 1,122,816.79
  5. Step 5: Solve for x
    x = 1,122,816.79/976.20
  6. Step 6: Final answer
    x = 1,150.19

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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.