Home / 3,128.45-4,316.95-1,869.26

Finding the Fourth Proportional to 3,128.45, 4,316.95 and 1,869.26

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Solution

The fourth proportional to 3,128.45, 4,316.95 and 1,869.26 is: 2,579.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.45 : 4,316.95 = 1,869.26 : x
  2. Step 2: Convert to fraction form
    3,128.45/4,316.95 = 1,869.26/x
  3. Step 3: Cross multiply
    3,128.45x = 4,316.95 × 1,869.26
  4. Step 4: Simplify right side
    3,128.45x = 8,069,508.08
  5. Step 5: Solve for x
    x = 8,069,508.08/3,128.45
  6. Step 6: Final answer
    x = 2,579.39

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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.