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Finding the Fourth Proportional to 656.25, 984.27 and 217.69

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Solution

The fourth proportional to 656.25, 984.27 and 217.69 is: 326.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.25 : 984.27 = 217.69 : x
  2. Step 2: Convert to fraction form
    656.25/984.27 = 217.69/x
  3. Step 3: Cross multiply
    656.25x = 984.27 × 217.69
  4. Step 4: Simplify right side
    656.25x = 214,267.78
  5. Step 5: Solve for x
    x = 214,267.78/656.25
  6. Step 6: Final answer
    x = 326.50

Related Problems

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Half scale
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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.