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Finding the Fourth Proportional to 288.54, 433.26 and 279.63

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Solution

The fourth proportional to 288.54, 433.26 and 279.63 is: 419.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.54 : 433.26 = 279.63 : x
  2. Step 2: Convert to fraction form
    288.54/433.26 = 279.63/x
  3. Step 3: Cross multiply
    288.54x = 433.26 × 279.63
  4. Step 4: Simplify right side
    288.54x = 121,152.49
  5. Step 5: Solve for x
    x = 121,152.49/288.54
  6. Step 6: Final answer
    x = 419.88

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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.