Home / 2,115.56-2,918.76-1,230.64

Finding the Fourth Proportional to 2,115.56, 2,918.76 and 1,230.64

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Solution

The fourth proportional to 2,115.56, 2,918.76 and 1,230.64 is: 1,697.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.56 : 2,918.76 = 1,230.64 : x
  2. Step 2: Convert to fraction form
    2,115.56/2,918.76 = 1,230.64/x
  3. Step 3: Cross multiply
    2,115.56x = 2,918.76 × 1,230.64
  4. Step 4: Simplify right side
    2,115.56x = 3,591,942.81
  5. Step 5: Solve for x
    x = 3,591,942.81/2,115.56
  6. Step 6: Final answer
    x = 1,697.87

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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.