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Finding the Fourth Proportional to 902.59, 1,244.67 and 666.13

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Solution

The fourth proportional to 902.59, 1,244.67 and 666.13 is: 918.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.59 : 1,244.67 = 666.13 : x
  2. Step 2: Convert to fraction form
    902.59/1,244.67 = 666.13/x
  3. Step 3: Cross multiply
    902.59x = 1,244.67 × 666.13
  4. Step 4: Simplify right side
    902.59x = 829,112.03
  5. Step 5: Solve for x
    x = 829,112.03/902.59
  6. Step 6: Final answer
    x = 918.59

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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.