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Finding the Fourth Proportional to 607.57, 911.40 and 217.65

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Solution

The fourth proportional to 607.57, 911.40 and 217.65 is: 326.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.57 : 911.40 = 217.65 : x
  2. Step 2: Convert to fraction form
    607.57/911.40 = 217.65/x
  3. Step 3: Cross multiply
    607.57x = 911.40 × 217.65
  4. Step 4: Simplify right side
    607.57x = 198,366.21
  5. Step 5: Solve for x
    x = 198,366.21/607.57
  6. Step 6: Final answer
    x = 326.49

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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.