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Finding the Fourth Proportional to 399.20, 597.72 and 236.60

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Solution

The fourth proportional to 399.20, 597.72 and 236.60 is: 354.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.20 : 597.72 = 236.60 : x
  2. Step 2: Convert to fraction form
    399.20/597.72 = 236.60/x
  3. Step 3: Cross multiply
    399.20x = 597.72 × 236.60
  4. Step 4: Simplify right side
    399.20x = 141,420.55
  5. Step 5: Solve for x
    x = 141,420.55/399.20
  6. Step 6: Final answer
    x = 354.26

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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.