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Finding the Fourth Proportional to 660.61, 992.04 and 550.81

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Solution

The fourth proportional to 660.61, 992.04 and 550.81 is: 827.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.61 : 992.04 = 550.81 : x
  2. Step 2: Convert to fraction form
    660.61/992.04 = 550.81/x
  3. Step 3: Cross multiply
    660.61x = 992.04 × 550.81
  4. Step 4: Simplify right side
    660.61x = 546,425.55
  5. Step 5: Solve for x
    x = 546,425.55/660.61
  6. Step 6: Final answer
    x = 827.15

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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.