Home / 2,415.12-3,619.88-1,113.88

Finding the Fourth Proportional to 2,415.12, 3,619.88 and 1,113.88

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Solution

The fourth proportional to 2,415.12, 3,619.88 and 1,113.88 is: 1,669.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.12 : 3,619.88 = 1,113.88 : x
  2. Step 2: Convert to fraction form
    2,415.12/3,619.88 = 1,113.88/x
  3. Step 3: Cross multiply
    2,415.12x = 3,619.88 × 1,113.88
  4. Step 4: Simplify right side
    2,415.12x = 4,032,111.93
  5. Step 5: Solve for x
    x = 4,032,111.93/2,415.12
  6. Step 6: Final answer
    x = 1,669.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.