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Finding the Fourth Proportional to 654.96, 902.97 and 561.31

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Solution

The fourth proportional to 654.96, 902.97 and 561.31 is: 773.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.96 : 902.97 = 561.31 : x
  2. Step 2: Convert to fraction form
    654.96/902.97 = 561.31/x
  3. Step 3: Cross multiply
    654.96x = 902.97 × 561.31
  4. Step 4: Simplify right side
    654.96x = 506,846.09
  5. Step 5: Solve for x
    x = 506,846.09/654.96
  6. Step 6: Final answer
    x = 773.86

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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.