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Finding the Fourth Proportional to 748.02, 1,121.05 and 358.15

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Solution

The fourth proportional to 748.02, 1,121.05 and 358.15 is: 536.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.02 : 1,121.05 = 358.15 : x
  2. Step 2: Convert to fraction form
    748.02/1,121.05 = 358.15/x
  3. Step 3: Cross multiply
    748.02x = 1,121.05 × 358.15
  4. Step 4: Simplify right side
    748.02x = 401,504.06
  5. Step 5: Solve for x
    x = 401,504.06/748.02
  6. Step 6: Final answer
    x = 536.76

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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.