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Finding the Fourth Proportional to 902.42, 1,243.61 and 622.14

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Solution

The fourth proportional to 902.42, 1,243.61 and 622.14 is: 857.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.42 : 1,243.61 = 622.14 : x
  2. Step 2: Convert to fraction form
    902.42/1,243.61 = 622.14/x
  3. Step 3: Cross multiply
    902.42x = 1,243.61 × 622.14
  4. Step 4: Simplify right side
    902.42x = 773,699.53
  5. Step 5: Solve for x
    x = 773,699.53/902.42
  6. Step 6: Final answer
    x = 857.36

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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.