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Finding the Fourth Proportional to 650.28, 976.76 and 390.77

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Solution

The fourth proportional to 650.28, 976.76 and 390.77 is: 586.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.28 : 976.76 = 390.77 : x
  2. Step 2: Convert to fraction form
    650.28/976.76 = 390.77/x
  3. Step 3: Cross multiply
    650.28x = 976.76 × 390.77
  4. Step 4: Simplify right side
    650.28x = 381,692.29
  5. Step 5: Solve for x
    x = 381,692.29/650.28
  6. Step 6: Final answer
    x = 586.97

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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.