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Finding the Fourth Proportional to 902.60, 1,247.27 and 681.15

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Solution

The fourth proportional to 902.60, 1,247.27 and 681.15 is: 941.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.60 : 1,247.27 = 681.15 : x
  2. Step 2: Convert to fraction form
    902.60/1,247.27 = 681.15/x
  3. Step 3: Cross multiply
    902.60x = 1,247.27 × 681.15
  4. Step 4: Simplify right side
    902.60x = 849,574.55
  5. Step 5: Solve for x
    x = 849,574.55/902.60
  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.