Home / 1,555.98-2,147.19-1,113.90

Finding the Fourth Proportional to 1,555.98, 2,147.19 and 1,113.90

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Solution

The fourth proportional to 1,555.98, 2,147.19 and 1,113.90 is: 1,537.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.98 : 2,147.19 = 1,113.90 : x
  2. Step 2: Convert to fraction form
    1,555.98/2,147.19 = 1,113.90/x
  3. Step 3: Cross multiply
    1,555.98x = 2,147.19 × 1,113.90
  4. Step 4: Simplify right side
    1,555.98x = 2,391,754.94
  5. Step 5: Solve for x
    x = 2,391,754.94/1,555.98
  6. Step 6: Final answer
    x = 1,537.14

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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.