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Finding the Fourth Proportional to 899.64, 1,241.51 and 501.31

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Solution

The fourth proportional to 899.64, 1,241.51 and 501.31 is: 691.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.64 : 1,241.51 = 501.31 : x
  2. Step 2: Convert to fraction form
    899.64/1,241.51 = 501.31/x
  3. Step 3: Cross multiply
    899.64x = 1,241.51 × 501.31
  4. Step 4: Simplify right side
    899.64x = 622,372.66
  5. Step 5: Solve for x
    x = 622,372.66/899.64
  6. Step 6: Final answer
    x = 691.81

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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.