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Finding the Fourth Proportional to 736.53, 1,103.96 and 390.05

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Solution

The fourth proportional to 736.53, 1,103.96 and 390.05 is: 584.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.53 : 1,103.96 = 390.05 : x
  2. Step 2: Convert to fraction form
    736.53/1,103.96 = 390.05/x
  3. Step 3: Cross multiply
    736.53x = 1,103.96 × 390.05
  4. Step 4: Simplify right side
    736.53x = 430,599.60
  5. Step 5: Solve for x
    x = 430,599.60/736.53
  6. Step 6: Final answer
    x = 584.63

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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.