Home / 1,558.47-2,149.92-1,138.11

Finding the Fourth Proportional to 1,558.47, 2,149.92 and 1,138.11

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Solution

The fourth proportional to 1,558.47, 2,149.92 and 1,138.11 is: 1,570.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.47 : 2,149.92 = 1,138.11 : x
  2. Step 2: Convert to fraction form
    1,558.47/2,149.92 = 1,138.11/x
  3. Step 3: Cross multiply
    1,558.47x = 2,149.92 × 1,138.11
  4. Step 4: Simplify right side
    1,558.47x = 2,446,845.45
  5. Step 5: Solve for x
    x = 2,446,845.45/1,558.47
  6. Step 6: Final answer
    x = 1,570.03

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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.