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Finding the Fourth Proportional to 1,170.23, 1,612.85 and 889.83

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Solution

The fourth proportional to 1,170.23, 1,612.85 and 889.83 is: 1,226.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.23 : 1,612.85 = 889.83 : x
  2. Step 2: Convert to fraction form
    1,170.23/1,612.85 = 889.83/x
  3. Step 3: Cross multiply
    1,170.23x = 1,612.85 × 889.83
  4. Step 4: Simplify right side
    1,170.23x = 1,435,157.87
  5. Step 5: Solve for x
    x = 1,435,157.87/1,170.23
  6. Step 6: Final answer
    x = 1,226.39

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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.