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Finding the Fourth Proportional to 738.38, 1,107.58 and 353.90

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Solution

The fourth proportional to 738.38, 1,107.58 and 353.90 is: 530.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.38 : 1,107.58 = 353.90 : x
  2. Step 2: Convert to fraction form
    738.38/1,107.58 = 353.90/x
  3. Step 3: Cross multiply
    738.38x = 1,107.58 × 353.90
  4. Step 4: Simplify right side
    738.38x = 391,972.56
  5. Step 5: Solve for x
    x = 391,972.56/738.38
  6. Step 6: Final answer
    x = 530.85

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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.