Home / 1,226.61-1,683.84-1,128.18

Finding the Fourth Proportional to 1,226.61, 1,683.84 and 1,128.18

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Solution

The fourth proportional to 1,226.61, 1,683.84 and 1,128.18 is: 1,548.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.61 : 1,683.84 = 1,128.18 : x
  2. Step 2: Convert to fraction form
    1,226.61/1,683.84 = 1,128.18/x
  3. Step 3: Cross multiply
    1,226.61x = 1,683.84 × 1,128.18
  4. Step 4: Simplify right side
    1,226.61x = 1,899,674.61
  5. Step 5: Solve for x
    x = 1,899,674.61/1,226.61
  6. Step 6: Final answer
    x = 1,548.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.