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Finding the Fourth Proportional to 640.77, 961.16 and 366.67

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Solution

The fourth proportional to 640.77, 961.16 and 366.67 is: 550.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.77 : 961.16 = 366.67 : x
  2. Step 2: Convert to fraction form
    640.77/961.16 = 366.67/x
  3. Step 3: Cross multiply
    640.77x = 961.16 × 366.67
  4. Step 4: Simplify right side
    640.77x = 352,424.30
  5. Step 5: Solve for x
    x = 352,424.30/640.77
  6. Step 6: Final answer
    x = 550.00

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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.