Home / 1,558.72-2,151.88-1,138.64

Finding the Fourth Proportional to 1,558.72, 2,151.88 and 1,138.64

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Solution

The fourth proportional to 1,558.72, 2,151.88 and 1,138.64 is: 1,571.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.72 : 2,151.88 = 1,138.64 : x
  2. Step 2: Convert to fraction form
    1,558.72/2,151.88 = 1,138.64/x
  3. Step 3: Cross multiply
    1,558.72x = 2,151.88 × 1,138.64
  4. Step 4: Simplify right side
    1,558.72x = 2,450,216.64
  5. Step 5: Solve for x
    x = 2,450,216.64/1,558.72
  6. Step 6: Final answer
    x = 1,571.94

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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.