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Finding the Fourth Proportional to 289.93, 399.24 and 263.56

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Solution

The fourth proportional to 289.93, 399.24 and 263.56 is: 362.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.93 : 399.24 = 263.56 : x
  2. Step 2: Convert to fraction form
    289.93/399.24 = 263.56/x
  3. Step 3: Cross multiply
    289.93x = 399.24 × 263.56
  4. Step 4: Simplify right side
    289.93x = 105,223.69
  5. Step 5: Solve for x
    x = 105,223.69/289.93
  6. Step 6: Final answer
    x = 362.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.