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Finding the Fourth Proportional to 909.23, 1,364.21 and 361.58

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Solution

The fourth proportional to 909.23, 1,364.21 and 361.58 is: 542.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.23 : 1,364.21 = 361.58 : x
  2. Step 2: Convert to fraction form
    909.23/1,364.21 = 361.58/x
  3. Step 3: Cross multiply
    909.23x = 1,364.21 × 361.58
  4. Step 4: Simplify right side
    909.23x = 493,262.42
  5. Step 5: Solve for x
    x = 493,262.42/909.23
  6. Step 6: Final answer
    x = 542.51

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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.