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Finding the Fourth Proportional to 738.02, 1,105.67 and 348.34

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Solution

The fourth proportional to 738.02, 1,105.67 and 348.34 is: 521.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.02 : 1,105.67 = 348.34 : x
  2. Step 2: Convert to fraction form
    738.02/1,105.67 = 348.34/x
  3. Step 3: Cross multiply
    738.02x = 1,105.67 × 348.34
  4. Step 4: Simplify right side
    738.02x = 385,147.19
  5. Step 5: Solve for x
    x = 385,147.19/738.02
  6. Step 6: Final answer
    x = 521.87

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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.