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Finding the Fourth Proportional to 891.66, 1,226.58 and 725.51

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Solution

The fourth proportional to 891.66, 1,226.58 and 725.51 is: 998.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.66 : 1,226.58 = 725.51 : x
  2. Step 2: Convert to fraction form
    891.66/1,226.58 = 725.51/x
  3. Step 3: Cross multiply
    891.66x = 1,226.58 × 725.51
  4. Step 4: Simplify right side
    891.66x = 889,889.92
  5. Step 5: Solve for x
    x = 889,889.92/891.66
  6. Step 6: Final answer
    x = 998.01

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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.