Home / 3,129.40-4,316.51-1,869.46

Finding the Fourth Proportional to 3,129.40, 4,316.51 and 1,869.46

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Solution

The fourth proportional to 3,129.40, 4,316.51 and 1,869.46 is: 2,578.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.40 : 4,316.51 = 1,869.46 : x
  2. Step 2: Convert to fraction form
    3,129.40/4,316.51 = 1,869.46/x
  3. Step 3: Cross multiply
    3,129.40x = 4,316.51 × 1,869.46
  4. Step 4: Simplify right side
    3,129.40x = 8,069,550.43
  5. Step 5: Solve for x
    x = 8,069,550.43/3,129.40
  6. Step 6: Final answer
    x = 2,578.62

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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.