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Finding the Fourth Proportional to 660.45, 911.46 and 365.74

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Solution

The fourth proportional to 660.45, 911.46 and 365.74 is: 504.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.45 : 911.46 = 365.74 : x
  2. Step 2: Convert to fraction form
    660.45/911.46 = 365.74/x
  3. Step 3: Cross multiply
    660.45x = 911.46 × 365.74
  4. Step 4: Simplify right side
    660.45x = 333,357.38
  5. Step 5: Solve for x
    x = 333,357.38/660.45
  6. Step 6: Final answer
    x = 504.74

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1.5x scale

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.