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Finding the Fourth Proportional to 884.57, 1,219.79 and 760.64

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Solution

The fourth proportional to 884.57, 1,219.79 and 760.64 is: 1,048.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.57 : 1,219.79 = 760.64 : x
  2. Step 2: Convert to fraction form
    884.57/1,219.79 = 760.64/x
  3. Step 3: Cross multiply
    884.57x = 1,219.79 × 760.64
  4. Step 4: Simplify right side
    884.57x = 927,816.87
  5. Step 5: Solve for x
    x = 927,816.87/884.57
  6. Step 6: Final answer
    x = 1,048.90

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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.