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Finding the Fourth Proportional to 984.08, 1,357.28 and 910.24

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Solution

The fourth proportional to 984.08, 1,357.28 and 910.24 is: 1,255.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.08 : 1,357.28 = 910.24 : x
  2. Step 2: Convert to fraction form
    984.08/1,357.28 = 910.24/x
  3. Step 3: Cross multiply
    984.08x = 1,357.28 × 910.24
  4. Step 4: Simplify right side
    984.08x = 1,235,450.55
  5. Step 5: Solve for x
    x = 1,235,450.55/984.08
  6. Step 6: Final answer
    x = 1,255.44

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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.