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Finding the Fourth Proportional to 909.26, 1,251.94 and 761.58

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Solution

The fourth proportional to 909.26, 1,251.94 and 761.58 is: 1,048.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.26 : 1,251.94 = 761.58 : x
  2. Step 2: Convert to fraction form
    909.26/1,251.94 = 761.58/x
  3. Step 3: Cross multiply
    909.26x = 1,251.94 × 761.58
  4. Step 4: Simplify right side
    909.26x = 953,452.47
  5. Step 5: Solve for x
    x = 953,452.47/909.26
  6. Step 6: Final answer
    x = 1,048.60

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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.