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Finding the Fourth Proportional to 909.30, 1,363.50 and 422.04

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Solution

The fourth proportional to 909.30, 1,363.50 and 422.04 is: 632.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.30 : 1,363.50 = 422.04 : x
  2. Step 2: Convert to fraction form
    909.30/1,363.50 = 422.04/x
  3. Step 3: Cross multiply
    909.30x = 1,363.50 × 422.04
  4. Step 4: Simplify right side
    909.30x = 575,451.54
  5. Step 5: Solve for x
    x = 575,451.54/909.30
  6. Step 6: Final answer
    x = 632.85

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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.