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Finding the Fourth Proportional to 886.61, 1,222.97 and 637.54

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Solution

The fourth proportional to 886.61, 1,222.97 and 637.54 is: 879.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.61 : 1,222.97 = 637.54 : x
  2. Step 2: Convert to fraction form
    886.61/1,222.97 = 637.54/x
  3. Step 3: Cross multiply
    886.61x = 1,222.97 × 637.54
  4. Step 4: Simplify right side
    886.61x = 779,693.72
  5. Step 5: Solve for x
    x = 779,693.72/886.61
  6. Step 6: Final answer
    x = 879.41

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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.