Home / 1,391.11-1,917.68-1,058.96

Finding the Fourth Proportional to 1,391.11, 1,917.68 and 1,058.96

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Solution

The fourth proportional to 1,391.11, 1,917.68 and 1,058.96 is: 1,459.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.11 : 1,917.68 = 1,058.96 : x
  2. Step 2: Convert to fraction form
    1,391.11/1,917.68 = 1,058.96/x
  3. Step 3: Cross multiply
    1,391.11x = 1,917.68 × 1,058.96
  4. Step 4: Simplify right side
    1,391.11x = 2,030,736.82
  5. Step 5: Solve for x
    x = 2,030,736.82/1,391.11
  6. Step 6: Final answer
    x = 1,459.80

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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.