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Finding the Fourth Proportional to 285.69, 427.71 and 262.92

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Solution

The fourth proportional to 285.69, 427.71 and 262.92 is: 393.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.69 : 427.71 = 262.92 : x
  2. Step 2: Convert to fraction form
    285.69/427.71 = 262.92/x
  3. Step 3: Cross multiply
    285.69x = 427.71 × 262.92
  4. Step 4: Simplify right side
    285.69x = 112,453.51
  5. Step 5: Solve for x
    x = 112,453.51/285.69
  6. Step 6: Final answer
    x = 393.62

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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.