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Finding the Fourth Proportional to 288.76, 433.68 and 279.48

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Solution

The fourth proportional to 288.76, 433.68 and 279.48 is: 419.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.76 : 433.68 = 279.48 : x
  2. Step 2: Convert to fraction form
    288.76/433.68 = 279.48/x
  3. Step 3: Cross multiply
    288.76x = 433.68 × 279.48
  4. Step 4: Simplify right side
    288.76x = 121,204.89
  5. Step 5: Solve for x
    x = 121,204.89/288.76
  6. Step 6: Final answer
    x = 419.74

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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.