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Finding the Fourth Proportional to 1,722.56, 2,377.10 and 936.60

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Solution

The fourth proportional to 1,722.56, 2,377.10 and 936.60 is: 1,292.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.56 : 2,377.10 = 936.60 : x
  2. Step 2: Convert to fraction form
    1,722.56/2,377.10 = 936.60/x
  3. Step 3: Cross multiply
    1,722.56x = 2,377.10 × 936.60
  4. Step 4: Simplify right side
    1,722.56x = 2,226,391.86
  5. Step 5: Solve for x
    x = 2,226,391.86/1,722.56
  6. Step 6: Final answer
    x = 1,292.49

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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.