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Finding the Fourth Proportional to 660.20, 911.09 and 365.49

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Solution

The fourth proportional to 660.20, 911.09 and 365.49 is: 504.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.20 : 911.09 = 365.49 : x
  2. Step 2: Convert to fraction form
    660.20/911.09 = 365.49/x
  3. Step 3: Cross multiply
    660.20x = 911.09 × 365.49
  4. Step 4: Simplify right side
    660.20x = 332,994.28
  5. Step 5: Solve for x
    x = 332,994.28/660.20
  6. Step 6: Final answer
    x = 504.38

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Find fourth proportional to 330.10, 455.55 and 182.75
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Double scale
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Similar ratio
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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.