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Finding the Fourth Proportional to 650.91, 976.47 and 285.69

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Solution

The fourth proportional to 650.91, 976.47 and 285.69 is: 428.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.91 : 976.47 = 285.69 : x
  2. Step 2: Convert to fraction form
    650.91/976.47 = 285.69/x
  3. Step 3: Cross multiply
    650.91x = 976.47 × 285.69
  4. Step 4: Simplify right side
    650.91x = 278,967.71
  5. Step 5: Solve for x
    x = 278,967.71/650.91
  6. Step 6: Final answer
    x = 428.58

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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.