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Finding the Fourth Proportional to 262.60, 360.65 and 218.86

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Solution

The fourth proportional to 262.60, 360.65 and 218.86 is: 300.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.60 : 360.65 = 218.86 : x
  2. Step 2: Convert to fraction form
    262.60/360.65 = 218.86/x
  3. Step 3: Cross multiply
    262.60x = 360.65 × 218.86
  4. Step 4: Simplify right side
    262.60x = 78,931.86
  5. Step 5: Solve for x
    x = 78,931.86/262.60
  6. Step 6: Final answer
    x = 300.58

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.