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Finding the Fourth Proportional to 645.87, 968.70 and 183.69

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Solution

The fourth proportional to 645.87, 968.70 and 183.69 is: 275.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.87 : 968.70 = 183.69 : x
  2. Step 2: Convert to fraction form
    645.87/968.70 = 183.69/x
  3. Step 3: Cross multiply
    645.87x = 968.70 × 183.69
  4. Step 4: Simplify right side
    645.87x = 177,935.66
  5. Step 5: Solve for x
    x = 177,935.66/645.87
  6. Step 6: Final answer
    x = 275.50

Related Problems

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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.