Home / 1,558.18-2,150.31-859.57

Finding the Fourth Proportional to 1,558.18, 2,150.31 and 859.57

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Solution

The fourth proportional to 1,558.18, 2,150.31 and 859.57 is: 1,186.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.18 : 2,150.31 = 859.57 : x
  2. Step 2: Convert to fraction form
    1,558.18/2,150.31 = 859.57/x
  3. Step 3: Cross multiply
    1,558.18x = 2,150.31 × 859.57
  4. Step 4: Simplify right side
    1,558.18x = 1,848,341.97
  5. Step 5: Solve for x
    x = 1,848,341.97/1,558.18
  6. Step 6: Final answer
    x = 1,186.22

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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.