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Finding the Fourth Proportional to 925.90, 1,392.06 and 744.55

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Solution

The fourth proportional to 925.90, 1,392.06 and 744.55 is: 1,119.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.90 : 1,392.06 = 744.55 : x
  2. Step 2: Convert to fraction form
    925.90/1,392.06 = 744.55/x
  3. Step 3: Cross multiply
    925.90x = 1,392.06 × 744.55
  4. Step 4: Simplify right side
    925.90x = 1,036,458.27
  5. Step 5: Solve for x
    x = 1,036,458.27/925.90
  6. Step 6: Final answer
    x = 1,119.41

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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.