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Finding the Fourth Proportional to 899.39, 1,241.17 and 506.42

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Solution

The fourth proportional to 899.39, 1,241.17 and 506.42 is: 698.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.39 : 1,241.17 = 506.42 : x
  2. Step 2: Convert to fraction form
    899.39/1,241.17 = 506.42/x
  3. Step 3: Cross multiply
    899.39x = 1,241.17 × 506.42
  4. Step 4: Simplify right side
    899.39x = 628,555.15
  5. Step 5: Solve for x
    x = 628,555.15/899.39
  6. Step 6: Final answer
    x = 698.87

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.