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Finding the Fourth Proportional to 1,097.43, 1,511.91 and 761.01

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Solution

The fourth proportional to 1,097.43, 1,511.91 and 761.01 is: 1,048.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.43 : 1,511.91 = 761.01 : x
  2. Step 2: Convert to fraction form
    1,097.43/1,511.91 = 761.01/x
  3. Step 3: Cross multiply
    1,097.43x = 1,511.91 × 761.01
  4. Step 4: Simplify right side
    1,097.43x = 1,150,578.63
  5. Step 5: Solve for x
    x = 1,150,578.63/1,097.43
  6. Step 6: Final answer
    x = 1,048.43

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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.