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Finding the Fourth Proportional to 607.86, 911.70 and 445.86

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Solution

The fourth proportional to 607.86, 911.70 and 445.86 is: 668.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.86 : 911.70 = 445.86 : x
  2. Step 2: Convert to fraction form
    607.86/911.70 = 445.86/x
  3. Step 3: Cross multiply
    607.86x = 911.70 × 445.86
  4. Step 4: Simplify right side
    607.86x = 406,490.56
  5. Step 5: Solve for x
    x = 406,490.56/607.86
  6. Step 6: Final answer
    x = 668.72

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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.