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Finding the Fourth Proportional to 902.21, 1,246.86 and 681.08

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Solution

The fourth proportional to 902.21, 1,246.86 and 681.08 is: 941.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.21 : 1,246.86 = 681.08 : x
  2. Step 2: Convert to fraction form
    902.21/1,246.86 = 681.08/x
  3. Step 3: Cross multiply
    902.21x = 1,246.86 × 681.08
  4. Step 4: Simplify right side
    902.21x = 849,205.17
  5. Step 5: Solve for x
    x = 849,205.17/902.21
  6. Step 6: Final answer
    x = 941.26

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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.