Home / 2,451.60-3,382.90-1,389.20

Finding the Fourth Proportional to 2,451.60, 3,382.90 and 1,389.20

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Solution

The fourth proportional to 2,451.60, 3,382.90 and 1,389.20 is: 1,916.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,451.60 : 3,382.90 = 1,389.20 : x
  2. Step 2: Convert to fraction form
    2,451.60/3,382.90 = 1,389.20/x
  3. Step 3: Cross multiply
    2,451.60x = 3,382.90 × 1,389.20
  4. Step 4: Simplify right side
    2,451.60x = 4,699,529.18
  5. Step 5: Solve for x
    x = 4,699,529.18/2,451.60
  6. Step 6: Final answer
    x = 1,916.92

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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.