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Finding the Fourth Proportional to 889.83, 1,330.72 and 667.62

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Solution

The fourth proportional to 889.83, 1,330.72 and 667.62 is: 998.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.83 : 1,330.72 = 667.62 : x
  2. Step 2: Convert to fraction form
    889.83/1,330.72 = 667.62/x
  3. Step 3: Cross multiply
    889.83x = 1,330.72 × 667.62
  4. Step 4: Simplify right side
    889.83x = 888,411.95
  5. Step 5: Solve for x
    x = 888,411.95/889.83
  6. Step 6: Final answer
    x = 998.41

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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.