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Finding the Fourth Proportional to 1,341.45, 2,007.86 and 691.29

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Solution

The fourth proportional to 1,341.45, 2,007.86 and 691.29 is: 1,034.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,341.45 : 2,007.86 = 691.29 : x
  2. Step 2: Convert to fraction form
    1,341.45/2,007.86 = 691.29/x
  3. Step 3: Cross multiply
    1,341.45x = 2,007.86 × 691.29
  4. Step 4: Simplify right side
    1,341.45x = 1,388,010.08
  5. Step 5: Solve for x
    x = 1,388,010.08/1,341.45
  6. Step 6: Final answer
    x = 1,034.71

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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.