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Finding the Fourth Proportional to 889.14, 1,226.83 and 679.55

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Solution

The fourth proportional to 889.14, 1,226.83 and 679.55 is: 937.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.14 : 1,226.83 = 679.55 : x
  2. Step 2: Convert to fraction form
    889.14/1,226.83 = 679.55/x
  3. Step 3: Cross multiply
    889.14x = 1,226.83 × 679.55
  4. Step 4: Simplify right side
    889.14x = 833,688.93
  5. Step 5: Solve for x
    x = 833,688.93/889.14
  6. Step 6: Final answer
    x = 937.64

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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.