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Finding the Fourth Proportional to 1,951, 2,691.54 and 1,278.58

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Solution

The fourth proportional to 1,951, 2,691.54 and 1,278.58 is: 1,763.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951 : 2,691.54 = 1,278.58 : x
  2. Step 2: Convert to fraction form
    1,951/2,691.54 = 1,278.58/x
  3. Step 3: Cross multiply
    1,951x = 2,691.54 × 1,278.58
  4. Step 4: Simplify right side
    1,951x = 3,441,349.21
  5. Step 5: Solve for x
    x = 3,441,349.21/1,951
  6. Step 6: Final answer
    x = 1,763.89

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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.