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Finding the Fourth Proportional to 660.80, 992.73 and 414.77

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Solution

The fourth proportional to 660.80, 992.73 and 414.77 is: 623.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.80 : 992.73 = 414.77 : x
  2. Step 2: Convert to fraction form
    660.80/992.73 = 414.77/x
  3. Step 3: Cross multiply
    660.80x = 992.73 × 414.77
  4. Step 4: Simplify right side
    660.80x = 411,754.62
  5. Step 5: Solve for x
    x = 411,754.62/660.80
  6. Step 6: Final answer
    x = 623.12

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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.