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Finding the Fourth Proportional to 889.30, 1,227.18 and 679.58

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Solution

The fourth proportional to 889.30, 1,227.18 and 679.58 is: 937.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.30 : 1,227.18 = 679.58 : x
  2. Step 2: Convert to fraction form
    889.30/1,227.18 = 679.58/x
  3. Step 3: Cross multiply
    889.30x = 1,227.18 × 679.58
  4. Step 4: Simplify right side
    889.30x = 833,966.98
  5. Step 5: Solve for x
    x = 833,966.98/889.30
  6. Step 6: Final answer
    x = 937.78

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1.5x scale

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.