Home / 1,965.36-2,931.18-1,861.68

Finding the Fourth Proportional to 1,965.36, 2,931.18 and 1,861.68

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Solution

The fourth proportional to 1,965.36, 2,931.18 and 1,861.68 is: 2,776.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.36 : 2,931.18 = 1,861.68 : x
  2. Step 2: Convert to fraction form
    1,965.36/2,931.18 = 1,861.68/x
  3. Step 3: Cross multiply
    1,965.36x = 2,931.18 × 1,861.68
  4. Step 4: Simplify right side
    1,965.36x = 5,456,919.18
  5. Step 5: Solve for x
    x = 5,456,919.18/1,965.36
  6. Step 6: Final answer
    x = 2,776.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.