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Finding the Fourth Proportional to 1,095.13, 1,510.62 and 721.97

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Solution

The fourth proportional to 1,095.13, 1,510.62 and 721.97 is: 995.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.13 : 1,510.62 = 721.97 : x
  2. Step 2: Convert to fraction form
    1,095.13/1,510.62 = 721.97/x
  3. Step 3: Cross multiply
    1,095.13x = 1,510.62 × 721.97
  4. Step 4: Simplify right side
    1,095.13x = 1,090,626.10
  5. Step 5: Solve for x
    x = 1,090,626.10/1,095.13
  6. Step 6: Final answer
    x = 995.89

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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.