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Finding the Fourth Proportional to 302.74, 419.31 and 282.92

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Solution

The fourth proportional to 302.74, 419.31 and 282.92 is: 391.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.74 : 419.31 = 282.92 : x
  2. Step 2: Convert to fraction form
    302.74/419.31 = 282.92/x
  3. Step 3: Cross multiply
    302.74x = 419.31 × 282.92
  4. Step 4: Simplify right side
    302.74x = 118,631.19
  5. Step 5: Solve for x
    x = 118,631.19/302.74
  6. Step 6: Final answer
    x = 391.86

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.