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Finding the Fourth Proportional to 2,671.78, 4,009.11 and 1,112.86

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Solution

The fourth proportional to 2,671.78, 4,009.11 and 1,112.86 is: 1,669.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,671.78 : 4,009.11 = 1,112.86 : x
  2. Step 2: Convert to fraction form
    2,671.78/4,009.11 = 1,112.86/x
  3. Step 3: Cross multiply
    2,671.78x = 4,009.11 × 1,112.86
  4. Step 4: Simplify right side
    2,671.78x = 4,461,578.15
  5. Step 5: Solve for x
    x = 4,461,578.15/2,671.78
  6. Step 6: Final answer
    x = 1,669.89

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1.5x scale

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.