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Finding the Fourth Proportional to 886.48, 1,220.79 and 883.78

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Solution

The fourth proportional to 886.48, 1,220.79 and 883.78 is: 1,217.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.48 : 1,220.79 = 883.78 : x
  2. Step 2: Convert to fraction form
    886.48/1,220.79 = 883.78/x
  3. Step 3: Cross multiply
    886.48x = 1,220.79 × 883.78
  4. Step 4: Simplify right side
    886.48x = 1,078,909.79
  5. Step 5: Solve for x
    x = 1,078,909.79/886.48
  6. Step 6: Final answer
    x = 1,217.07

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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.