Home / 2,421.80-3,343.58-1,861.18

Finding the Fourth Proportional to 2,421.80, 3,343.58 and 1,861.18

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Solution

The fourth proportional to 2,421.80, 3,343.58 and 1,861.18 is: 2,569.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.80 : 3,343.58 = 1,861.18 : x
  2. Step 2: Convert to fraction form
    2,421.80/3,343.58 = 1,861.18/x
  3. Step 3: Cross multiply
    2,421.80x = 3,343.58 × 1,861.18
  4. Step 4: Simplify right side
    2,421.80x = 6,222,993.54
  5. Step 5: Solve for x
    x = 6,222,993.54/2,421.80
  6. Step 6: Final answer
    x = 2,569.58

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1.5x scale

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.