Home / 1,223.91-1,683.99-1,057.59

Finding the Fourth Proportional to 1,223.91, 1,683.99 and 1,057.59

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Solution

The fourth proportional to 1,223.91, 1,683.99 and 1,057.59 is: 1,455.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.91 : 1,683.99 = 1,057.59 : x
  2. Step 2: Convert to fraction form
    1,223.91/1,683.99 = 1,057.59/x
  3. Step 3: Cross multiply
    1,223.91x = 1,683.99 × 1,057.59
  4. Step 4: Simplify right side
    1,223.91x = 1,780,970.98
  5. Step 5: Solve for x
    x = 1,780,970.98/1,223.91
  6. Step 6: Final answer
    x = 1,455.15

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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.