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Finding the Fourth Proportional to 443.68, 611.92 and 288.48

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Solution

The fourth proportional to 443.68, 611.92 and 288.48 is: 397.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.68 : 611.92 = 288.48 : x
  2. Step 2: Convert to fraction form
    443.68/611.92 = 288.48/x
  3. Step 3: Cross multiply
    443.68x = 611.92 × 288.48
  4. Step 4: Simplify right side
    443.68x = 176,526.68
  5. Step 5: Solve for x
    x = 176,526.68/443.68
  6. Step 6: Final answer
    x = 397.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.