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Finding the Fourth Proportional to 491.31, 736.73 and 285.94

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Solution

The fourth proportional to 491.31, 736.73 and 285.94 is: 428.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.31 : 736.73 = 285.94 : x
  2. Step 2: Convert to fraction form
    491.31/736.73 = 285.94/x
  3. Step 3: Cross multiply
    491.31x = 736.73 × 285.94
  4. Step 4: Simplify right side
    491.31x = 210,660.58
  5. Step 5: Solve for x
    x = 210,660.58/491.31
  6. Step 6: Final answer
    x = 428.77

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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.