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Finding the Fourth Proportional to 1,352.39, 1,866.42 and 792.80

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Solution

The fourth proportional to 1,352.39, 1,866.42 and 792.80 is: 1,094.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.39 : 1,866.42 = 792.80 : x
  2. Step 2: Convert to fraction form
    1,352.39/1,866.42 = 792.80/x
  3. Step 3: Cross multiply
    1,352.39x = 1,866.42 × 792.80
  4. Step 4: Simplify right side
    1,352.39x = 1,479,688.44
  5. Step 5: Solve for x
    x = 1,479,688.44/1,352.39
  6. Step 6: Final answer
    x = 1,094.13

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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.