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Finding the Fourth Proportional to 287.24, 393.51 and 276.72

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Solution

The fourth proportional to 287.24, 393.51 and 276.72 is: 379.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.24 : 393.51 = 276.72 : x
  2. Step 2: Convert to fraction form
    287.24/393.51 = 276.72/x
  3. Step 3: Cross multiply
    287.24x = 393.51 × 276.72
  4. Step 4: Simplify right side
    287.24x = 108,892.09
  5. Step 5: Solve for x
    x = 108,892.09/287.24
  6. Step 6: Final answer
    x = 379.10

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.