Home / 2,979.60-4,113.66-1,861.50

Finding the Fourth Proportional to 2,979.60, 4,113.66 and 1,861.50

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Solution

The fourth proportional to 2,979.60, 4,113.66 and 1,861.50 is: 2,570.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.60 : 4,113.66 = 1,861.50 : x
  2. Step 2: Convert to fraction form
    2,979.60/4,113.66 = 1,861.50/x
  3. Step 3: Cross multiply
    2,979.60x = 4,113.66 × 1,861.50
  4. Step 4: Simplify right side
    2,979.60x = 7,657,578.09
  5. Step 5: Solve for x
    x = 7,657,578.09/2,979.60
  6. Step 6: Final answer
    x = 2,570.00

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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.