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Finding the Fourth Proportional to 911.29, 1,258.73 and 793.03

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Solution

The fourth proportional to 911.29, 1,258.73 and 793.03 is: 1,095.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.29 : 1,258.73 = 793.03 : x
  2. Step 2: Convert to fraction form
    911.29/1,258.73 = 793.03/x
  3. Step 3: Cross multiply
    911.29x = 1,258.73 × 793.03
  4. Step 4: Simplify right side
    911.29x = 998,210.65
  5. Step 5: Solve for x
    x = 998,210.65/911.29
  6. Step 6: Final answer
    x = 1,095.38

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1.5x scale

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.