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Finding the Fourth Proportional to 1,095.26, 1,510.26 and 721.76

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Solution

The fourth proportional to 1,095.26, 1,510.26 and 721.76 is: 995.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.26 : 1,510.26 = 721.76 : x
  2. Step 2: Convert to fraction form
    1,095.26/1,510.26 = 721.76/x
  3. Step 3: Cross multiply
    1,095.26x = 1,510.26 × 721.76
  4. Step 4: Simplify right side
    1,095.26x = 1,090,045.26
  5. Step 5: Solve for x
    x = 1,090,045.26/1,095.26
  6. Step 6: Final answer
    x = 995.24

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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.