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Finding the Fourth Proportional to 740.92, 1,111.38 and 247.42

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Solution

The fourth proportional to 740.92, 1,111.38 and 247.42 is: 371.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.92 : 1,111.38 = 247.42 : x
  2. Step 2: Convert to fraction form
    740.92/1,111.38 = 247.42/x
  3. Step 3: Cross multiply
    740.92x = 1,111.38 × 247.42
  4. Step 4: Simplify right side
    740.92x = 274,977.64
  5. Step 5: Solve for x
    x = 274,977.64/740.92
  6. Step 6: Final answer
    x = 371.13

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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.