Home / 1,226.43-1,688.63-1,082.57

Finding the Fourth Proportional to 1,226.43, 1,688.63 and 1,082.57

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Solution

The fourth proportional to 1,226.43, 1,688.63 and 1,082.57 is: 1,490.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.43 : 1,688.63 = 1,082.57 : x
  2. Step 2: Convert to fraction form
    1,226.43/1,688.63 = 1,082.57/x
  3. Step 3: Cross multiply
    1,226.43x = 1,688.63 × 1,082.57
  4. Step 4: Simplify right side
    1,226.43x = 1,828,046.32
  5. Step 5: Solve for x
    x = 1,828,046.32/1,226.43
  6. Step 6: Final answer
    x = 1,490.54

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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.