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Finding the Fourth Proportional to 941.92, 1,298.08 and 679.48

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Solution

The fourth proportional to 941.92, 1,298.08 and 679.48 is: 936.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.92 : 1,298.08 = 679.48 : x
  2. Step 2: Convert to fraction form
    941.92/1,298.08 = 679.48/x
  3. Step 3: Cross multiply
    941.92x = 1,298.08 × 679.48
  4. Step 4: Simplify right side
    941.92x = 882,019.40
  5. Step 5: Solve for x
    x = 882,019.40/941.92
  6. Step 6: Final answer
    x = 936.41

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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.