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Finding the Fourth Proportional to 934.72, 1,289.40 and 759.76

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Solution

The fourth proportional to 934.72, 1,289.40 and 759.76 is: 1,048.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.72 : 1,289.40 = 759.76 : x
  2. Step 2: Convert to fraction form
    934.72/1,289.40 = 759.76/x
  3. Step 3: Cross multiply
    934.72x = 1,289.40 × 759.76
  4. Step 4: Simplify right side
    934.72x = 979,634.54
  5. Step 5: Solve for x
    x = 979,634.54/934.72
  6. Step 6: Final answer
    x = 1,048.05

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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.