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Finding the Fourth Proportional to 740.92, 1,111.83 and 412.11

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Solution

The fourth proportional to 740.92, 1,111.83 and 412.11 is: 618.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.92 : 1,111.83 = 412.11 : x
  2. Step 2: Convert to fraction form
    740.92/1,111.83 = 412.11/x
  3. Step 3: Cross multiply
    740.92x = 1,111.83 × 412.11
  4. Step 4: Simplify right side
    740.92x = 458,196.26
  5. Step 5: Solve for x
    x = 458,196.26/740.92
  6. Step 6: Final answer
    x = 618.42

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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.