Home / 1,558.32-2,147.50-1,115.44

Finding the Fourth Proportional to 1,558.32, 2,147.50 and 1,115.44

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Solution

The fourth proportional to 1,558.32, 2,147.50 and 1,115.44 is: 1,537.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.32 : 2,147.50 = 1,115.44 : x
  2. Step 2: Convert to fraction form
    1,558.32/2,147.50 = 1,115.44/x
  3. Step 3: Cross multiply
    1,558.32x = 2,147.50 × 1,115.44
  4. Step 4: Simplify right side
    1,558.32x = 2,395,407.40
  5. Step 5: Solve for x
    x = 2,395,407.40/1,558.32
  6. Step 6: Final answer
    x = 1,537.17

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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.