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Finding the Fourth Proportional to 289.56, 432.09 and 263.69

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Solution

The fourth proportional to 289.56, 432.09 and 263.69 is: 393.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.56 : 432.09 = 263.69 : x
  2. Step 2: Convert to fraction form
    289.56/432.09 = 263.69/x
  3. Step 3: Cross multiply
    289.56x = 432.09 × 263.69
  4. Step 4: Simplify right side
    289.56x = 113,935.65
  5. Step 5: Solve for x
    x = 113,935.65/289.56
  6. Step 6: Final answer
    x = 393.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.