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Finding the Fourth Proportional to 909.91, 1,364.85 and 636.54

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Solution

The fourth proportional to 909.91, 1,364.85 and 636.54 is: 954.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.91 : 1,364.85 = 636.54 : x
  2. Step 2: Convert to fraction form
    909.91/1,364.85 = 636.54/x
  3. Step 3: Cross multiply
    909.91x = 1,364.85 × 636.54
  4. Step 4: Simplify right side
    909.91x = 868,781.62
  5. Step 5: Solve for x
    x = 868,781.62/909.91
  6. Step 6: Final answer
    x = 954.80

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.