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Finding the Fourth Proportional to 475.39, 712.81 and 186.49

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Solution

The fourth proportional to 475.39, 712.81 and 186.49 is: 279.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.39 : 712.81 = 186.49 : x
  2. Step 2: Convert to fraction form
    475.39/712.81 = 186.49/x
  3. Step 3: Cross multiply
    475.39x = 712.81 × 186.49
  4. Step 4: Simplify right side
    475.39x = 132,931.94
  5. Step 5: Solve for x
    x = 132,931.94/475.39
  6. Step 6: Final answer
    x = 279.63

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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.