Home / 2,115.18-2,918.16-1,230.66

Finding the Fourth Proportional to 2,115.18, 2,918.16 and 1,230.66

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Solution

The fourth proportional to 2,115.18, 2,918.16 and 1,230.66 is: 1,697.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.18 : 2,918.16 = 1,230.66 : x
  2. Step 2: Convert to fraction form
    2,115.18/2,918.16 = 1,230.66/x
  3. Step 3: Cross multiply
    2,115.18x = 2,918.16 × 1,230.66
  4. Step 4: Simplify right side
    2,115.18x = 3,591,262.79
  5. Step 5: Solve for x
    x = 3,591,262.79/2,115.18
  6. Step 6: Final answer
    x = 1,697.85

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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.