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Finding the Fourth Proportional to 1,022.92, 1,409.13 and 742.33

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Solution

The fourth proportional to 1,022.92, 1,409.13 and 742.33 is: 1,022.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.92 : 1,409.13 = 742.33 : x
  2. Step 2: Convert to fraction form
    1,022.92/1,409.13 = 742.33/x
  3. Step 3: Cross multiply
    1,022.92x = 1,409.13 × 742.33
  4. Step 4: Simplify right side
    1,022.92x = 1,046,039.47
  5. Step 5: Solve for x
    x = 1,046,039.47/1,022.92
  6. Step 6: Final answer
    x = 1,022.60

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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.