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Finding the Fourth Proportional to 885.90, 1,219.93 and 866.73

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Solution

The fourth proportional to 885.90, 1,219.93 and 866.73 is: 1,193.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.90 : 1,219.93 = 866.73 : x
  2. Step 2: Convert to fraction form
    885.90/1,219.93 = 866.73/x
  3. Step 3: Cross multiply
    885.90x = 1,219.93 × 866.73
  4. Step 4: Simplify right side
    885.90x = 1,057,349.93
  5. Step 5: Solve for x
    x = 1,057,349.93/885.90
  6. Step 6: Final answer
    x = 1,193.53

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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.