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Finding the Fourth Proportional to 1,442.92, 2,164.36 and 793.28

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Solution

The fourth proportional to 1,442.92, 2,164.36 and 793.28 is: 1,189.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.92 : 2,164.36 = 793.28 : x
  2. Step 2: Convert to fraction form
    1,442.92/2,164.36 = 793.28/x
  3. Step 3: Cross multiply
    1,442.92x = 2,164.36 × 793.28
  4. Step 4: Simplify right side
    1,442.92x = 1,716,943.50
  5. Step 5: Solve for x
    x = 1,716,943.50/1,442.92
  6. Step 6: Final answer
    x = 1,189.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.