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Finding the Fourth Proportional to 902.88, 1,354.34 and 644.04

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Solution

The fourth proportional to 902.88, 1,354.34 and 644.04 is: 966.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.88 : 1,354.34 = 644.04 : x
  2. Step 2: Convert to fraction form
    902.88/1,354.34 = 644.04/x
  3. Step 3: Cross multiply
    902.88x = 1,354.34 × 644.04
  4. Step 4: Simplify right side
    902.88x = 872,249.13
  5. Step 5: Solve for x
    x = 872,249.13/902.88
  6. Step 6: Final answer
    x = 966.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.