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Finding the Fourth Proportional to 260.40, 390.24 and 233.40

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Solution

The fourth proportional to 260.40, 390.24 and 233.40 is: 349.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.40 : 390.24 = 233.40 : x
  2. Step 2: Convert to fraction form
    260.40/390.24 = 233.40/x
  3. Step 3: Cross multiply
    260.40x = 390.24 × 233.40
  4. Step 4: Simplify right side
    260.40x = 91,082.02
  5. Step 5: Solve for x
    x = 91,082.02/260.40
  6. Step 6: Final answer
    x = 349.78

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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.