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Finding the Fourth Proportional to 2,653.12, 3,981.12 and 1,114.08

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Solution

The fourth proportional to 2,653.12, 3,981.12 and 1,114.08 is: 1,671.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,653.12 : 3,981.12 = 1,114.08 : x
  2. Step 2: Convert to fraction form
    2,653.12/3,981.12 = 1,114.08/x
  3. Step 3: Cross multiply
    2,653.12x = 3,981.12 × 1,114.08
  4. Step 4: Simplify right side
    2,653.12x = 4,435,286.17
  5. Step 5: Solve for x
    x = 4,435,286.17/2,653.12
  6. Step 6: Final answer
    x = 1,671.72

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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.