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Finding the Fourth Proportional to 766.28, 1,146.74 and 550.28

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Solution

The fourth proportional to 766.28, 1,146.74 and 550.28 is: 823.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.28 : 1,146.74 = 550.28 : x
  2. Step 2: Convert to fraction form
    766.28/1,146.74 = 550.28/x
  3. Step 3: Cross multiply
    766.28x = 1,146.74 × 550.28
  4. Step 4: Simplify right side
    766.28x = 631,028.09
  5. Step 5: Solve for x
    x = 631,028.09/766.28
  6. Step 6: Final answer
    x = 823.50

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Half scale
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Double scale
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1.5x scale

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.