Home / 3,128.98-4,317.33-1,869.70

Finding the Fourth Proportional to 3,128.98, 4,317.33 and 1,869.70

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Solution

The fourth proportional to 3,128.98, 4,317.33 and 1,869.70 is: 2,579.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.98 : 4,317.33 = 1,869.70 : x
  2. Step 2: Convert to fraction form
    3,128.98/4,317.33 = 1,869.70/x
  3. Step 3: Cross multiply
    3,128.98x = 4,317.33 × 1,869.70
  4. Step 4: Simplify right side
    3,128.98x = 8,072,111.90
  5. Step 5: Solve for x
    x = 8,072,111.90/3,128.98
  6. Step 6: Final answer
    x = 2,579.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.