Home / 2,148.60-3,218.64-1,415.96

Finding the Fourth Proportional to 2,148.60, 3,218.64 and 1,415.96

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Solution

The fourth proportional to 2,148.60, 3,218.64 and 1,415.96 is: 2,121.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.60 : 3,218.64 = 1,415.96 : x
  2. Step 2: Convert to fraction form
    2,148.60/3,218.64 = 1,415.96/x
  3. Step 3: Cross multiply
    2,148.60x = 3,218.64 × 1,415.96
  4. Step 4: Simplify right side
    2,148.60x = 4,557,449.40
  5. Step 5: Solve for x
    x = 4,557,449.40/2,148.60
  6. Step 6: Final answer
    x = 2,121.13

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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.