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Finding the Fourth Proportional to 386.74, 533.81 and 262.76

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Solution

The fourth proportional to 386.74, 533.81 and 262.76 is: 362.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.74 : 533.81 = 262.76 : x
  2. Step 2: Convert to fraction form
    386.74/533.81 = 262.76/x
  3. Step 3: Cross multiply
    386.74x = 533.81 × 262.76
  4. Step 4: Simplify right side
    386.74x = 140,262.60
  5. Step 5: Solve for x
    x = 140,262.60/386.74
  6. Step 6: Final answer
    x = 362.68

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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.