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Finding the Fourth Proportional to 517.36, 776.20 and 286.16

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Solution

The fourth proportional to 517.36, 776.20 and 286.16 is: 429.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.36 : 776.20 = 286.16 : x
  2. Step 2: Convert to fraction form
    517.36/776.20 = 286.16/x
  3. Step 3: Cross multiply
    517.36x = 776.20 × 286.16
  4. Step 4: Simplify right side
    517.36x = 222,117.39
  5. Step 5: Solve for x
    x = 222,117.39/517.36
  6. Step 6: Final answer
    x = 429.33

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.