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Finding the Fourth Proportional to 888.54, 1,225.26 and 641.04

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Solution

The fourth proportional to 888.54, 1,225.26 and 641.04 is: 883.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.54 : 1,225.26 = 641.04 : x
  2. Step 2: Convert to fraction form
    888.54/1,225.26 = 641.04/x
  3. Step 3: Cross multiply
    888.54x = 1,225.26 × 641.04
  4. Step 4: Simplify right side
    888.54x = 785,440.67
  5. Step 5: Solve for x
    x = 785,440.67/888.54
  6. Step 6: Final answer
    x = 883.97

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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.