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Finding the Fourth Proportional to 1,454.79, 2,007.61 and 791.63

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Solution

The fourth proportional to 1,454.79, 2,007.61 and 791.63 is: 1,092.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,454.79 : 2,007.61 = 791.63 : x
  2. Step 2: Convert to fraction form
    1,454.79/2,007.61 = 791.63/x
  3. Step 3: Cross multiply
    1,454.79x = 2,007.61 × 791.63
  4. Step 4: Simplify right side
    1,454.79x = 1,589,280.35
  5. Step 5: Solve for x
    x = 1,589,280.35/1,454.79
  6. Step 6: Final answer
    x = 1,092.45

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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.