Home / 3,315.78-4,972.56-1,671.28

Finding the Fourth Proportional to 3,315.78, 4,972.56 and 1,671.28

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Solution

The fourth proportional to 3,315.78, 4,972.56 and 1,671.28 is: 2,506.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.78 : 4,972.56 = 1,671.28 : x
  2. Step 2: Convert to fraction form
    3,315.78/4,972.56 = 1,671.28/x
  3. Step 3: Cross multiply
    3,315.78x = 4,972.56 × 1,671.28
  4. Step 4: Simplify right side
    3,315.78x = 8,310,540.08
  5. Step 5: Solve for x
    x = 8,310,540.08/3,315.78
  6. Step 6: Final answer
    x = 2,506.36

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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.