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Finding the Fourth Proportional to 288.33, 432.09 and 260.79

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Solution

The fourth proportional to 288.33, 432.09 and 260.79 is: 390.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.33 : 432.09 = 260.79 : x
  2. Step 2: Convert to fraction form
    288.33/432.09 = 260.79/x
  3. Step 3: Cross multiply
    288.33x = 432.09 × 260.79
  4. Step 4: Simplify right side
    288.33x = 112,684.75
  5. Step 5: Solve for x
    x = 112,684.75/288.33
  6. Step 6: Final answer
    x = 390.82

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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.