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Finding the Fourth Proportional to 264.16, 394.80 and 186.80

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Solution

The fourth proportional to 264.16, 394.80 and 186.80 is: 279.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.16 : 394.80 = 186.80 : x
  2. Step 2: Convert to fraction form
    264.16/394.80 = 186.80/x
  3. Step 3: Cross multiply
    264.16x = 394.80 × 186.80
  4. Step 4: Simplify right side
    264.16x = 73,748.64
  5. Step 5: Solve for x
    x = 73,748.64/264.16
  6. Step 6: Final answer
    x = 279.18

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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.