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Finding the Fourth Proportional to 1,394.45, 1,924.31 and 773.45

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Solution

The fourth proportional to 1,394.45, 1,924.31 and 773.45 is: 1,067.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.45 : 1,924.31 = 773.45 : x
  2. Step 2: Convert to fraction form
    1,394.45/1,924.31 = 773.45/x
  3. Step 3: Cross multiply
    1,394.45x = 1,924.31 × 773.45
  4. Step 4: Simplify right side
    1,394.45x = 1,488,364.31
  5. Step 5: Solve for x
    x = 1,488,364.31/1,394.45
  6. Step 6: Final answer
    x = 1,067.35

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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.