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Finding the Fourth Proportional to 889.24, 1,333.38 and 611.92

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Solution

The fourth proportional to 889.24, 1,333.38 and 611.92 is: 917.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.24 : 1,333.38 = 611.92 : x
  2. Step 2: Convert to fraction form
    889.24/1,333.38 = 611.92/x
  3. Step 3: Cross multiply
    889.24x = 1,333.38 × 611.92
  4. Step 4: Simplify right side
    889.24x = 815,921.89
  5. Step 5: Solve for x
    x = 815,921.89/889.24
  6. Step 6: Final answer
    x = 917.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.