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Finding the Fourth Proportional to 262.45, 362.65 and 188.64

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Solution

The fourth proportional to 262.45, 362.65 and 188.64 is: 260.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.45 : 362.65 = 188.64 : x
  2. Step 2: Convert to fraction form
    262.45/362.65 = 188.64/x
  3. Step 3: Cross multiply
    262.45x = 362.65 × 188.64
  4. Step 4: Simplify right side
    262.45x = 68,409.82
  5. Step 5: Solve for x
    x = 68,409.82/262.45
  6. Step 6: Final answer
    x = 260.66

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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.