Home / 1,187.23-1,638.15-1,010.86

Finding the Fourth Proportional to 1,187.23, 1,638.15 and 1,010.86

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Solution

The fourth proportional to 1,187.23, 1,638.15 and 1,010.86 is: 1,394.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.23 : 1,638.15 = 1,010.86 : x
  2. Step 2: Convert to fraction form
    1,187.23/1,638.15 = 1,010.86/x
  3. Step 3: Cross multiply
    1,187.23x = 1,638.15 × 1,010.86
  4. Step 4: Simplify right side
    1,187.23x = 1,655,940.31
  5. Step 5: Solve for x
    x = 1,655,940.31/1,187.23
  6. Step 6: Final answer
    x = 1,394.79

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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.