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Finding the Fourth Proportional to 660.71, 911.80 and 365.98

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Solution

The fourth proportional to 660.71, 911.80 and 365.98 is: 505.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.71 : 911.80 = 365.98 : x
  2. Step 2: Convert to fraction form
    660.71/911.80 = 365.98/x
  3. Step 3: Cross multiply
    660.71x = 911.80 × 365.98
  4. Step 4: Simplify right side
    660.71x = 333,700.56
  5. Step 5: Solve for x
    x = 333,700.56/660.71
  6. Step 6: Final answer
    x = 505.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.