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Finding the Fourth Proportional to 607.39, 911.21 and 190.91

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Solution

The fourth proportional to 607.39, 911.21 and 190.91 is: 286.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.39 : 911.21 = 190.91 : x
  2. Step 2: Convert to fraction form
    607.39/911.21 = 190.91/x
  3. Step 3: Cross multiply
    607.39x = 911.21 × 190.91
  4. Step 4: Simplify right side
    607.39x = 173,959.10
  5. Step 5: Solve for x
    x = 173,959.10/607.39
  6. Step 6: Final answer
    x = 286.40

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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.