Home / 2,118.52-2,923.64-1,187

Finding the Fourth Proportional to 2,118.52, 2,923.64 and 1,187

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Solution

The fourth proportional to 2,118.52, 2,923.64 and 1,187 is: 1,638.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.52 : 2,923.64 = 1,187 : x
  2. Step 2: Convert to fraction form
    2,118.52/2,923.64 = 1,187/x
  3. Step 3: Cross multiply
    2,118.52x = 2,923.64 × 1,187
  4. Step 4: Simplify right side
    2,118.52x = 3,470,360.68
  5. Step 5: Solve for x
    x = 3,470,360.68/2,118.52
  6. Step 6: Final answer
    x = 1,638.11

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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.