Home / 1,137.44-1,569.60-640.12

Finding the Fourth Proportional to 1,137.44, 1,569.60 and 640.12

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Solution

The fourth proportional to 1,137.44, 1,569.60 and 640.12 is: 883.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.44 : 1,569.60 = 640.12 : x
  2. Step 2: Convert to fraction form
    1,137.44/1,569.60 = 640.12/x
  3. Step 3: Cross multiply
    1,137.44x = 1,569.60 × 640.12
  4. Step 4: Simplify right side
    1,137.44x = 1,004,728.43
  5. Step 5: Solve for x
    x = 1,004,728.43/1,137.44
  6. Step 6: Final answer
    x = 883.33

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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.