Home / 1,558.35-2,151.27-999.66

Finding the Fourth Proportional to 1,558.35, 2,151.27 and 999.66

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Solution

The fourth proportional to 1,558.35, 2,151.27 and 999.66 is: 1,380.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.35 : 2,151.27 = 999.66 : x
  2. Step 2: Convert to fraction form
    1,558.35/2,151.27 = 999.66/x
  3. Step 3: Cross multiply
    1,558.35x = 2,151.27 × 999.66
  4. Step 4: Simplify right side
    1,558.35x = 2,150,538.57
  5. Step 5: Solve for x
    x = 2,150,538.57/1,558.35
  6. Step 6: Final answer
    x = 1,380.01

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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.