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Finding the Fourth Proportional to 909.72, 1,361.34 and 632.14

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Solution

The fourth proportional to 909.72, 1,361.34 and 632.14 is: 945.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.72 : 1,361.34 = 632.14 : x
  2. Step 2: Convert to fraction form
    909.72/1,361.34 = 632.14/x
  3. Step 3: Cross multiply
    909.72x = 1,361.34 × 632.14
  4. Step 4: Simplify right side
    909.72x = 860,557.47
  5. Step 5: Solve for x
    x = 860,557.47/909.72
  6. Step 6: Final answer
    x = 945.96

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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.