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Finding the Fourth Proportional to 387.79, 535.00 and 247.88

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Solution

The fourth proportional to 387.79, 535.00 and 247.88 is: 341.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.79 : 535.00 = 247.88 : x
  2. Step 2: Convert to fraction form
    387.79/535.00 = 247.88/x
  3. Step 3: Cross multiply
    387.79x = 535.00 × 247.88
  4. Step 4: Simplify right side
    387.79x = 132,611.89
  5. Step 5: Solve for x
    x = 132,611.89/387.79
  6. Step 6: Final answer
    x = 341.97

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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.