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Finding the Fourth Proportional to 387.05, 576.65 and 366.39

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Solution

The fourth proportional to 387.05, 576.65 and 366.39 is: 545.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.05 : 576.65 = 366.39 : x
  2. Step 2: Convert to fraction form
    387.05/576.65 = 366.39/x
  3. Step 3: Cross multiply
    387.05x = 576.65 × 366.39
  4. Step 4: Simplify right side
    387.05x = 211,279.71
  5. Step 5: Solve for x
    x = 211,279.71/387.05
  6. Step 6: Final answer
    x = 545.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.