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Finding the Fourth Proportional to 909.17, 1,363.28 and 323.95

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Solution

The fourth proportional to 909.17, 1,363.28 and 323.95 is: 485.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.17 : 1,363.28 = 323.95 : x
  2. Step 2: Convert to fraction form
    909.17/1,363.28 = 323.95/x
  3. Step 3: Cross multiply
    909.17x = 1,363.28 × 323.95
  4. Step 4: Simplify right side
    909.17x = 441,627.74
  5. Step 5: Solve for x
    x = 441,627.74/909.17
  6. Step 6: Final answer
    x = 485.75

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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.