Home / 2,980.67-4,114.65-1,861.40

Finding the Fourth Proportional to 2,980.67, 4,114.65 and 1,861.40

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Solution

The fourth proportional to 2,980.67, 4,114.65 and 1,861.40 is: 2,569.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.67 : 4,114.65 = 1,861.40 : x
  2. Step 2: Convert to fraction form
    2,980.67/4,114.65 = 1,861.40/x
  3. Step 3: Cross multiply
    2,980.67x = 4,114.65 × 1,861.40
  4. Step 4: Simplify right side
    2,980.67x = 7,659,009.51
  5. Step 5: Solve for x
    x = 7,659,009.51/2,980.67
  6. Step 6: Final answer
    x = 2,569.56

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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.