Home / 1,424.32-2,123.24-1,340.80

Finding the Fourth Proportional to 1,424.32, 2,123.24 and 1,340.80

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Solution

The fourth proportional to 1,424.32, 2,123.24 and 1,340.80 is: 1,998.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.32 : 2,123.24 = 1,340.80 : x
  2. Step 2: Convert to fraction form
    1,424.32/2,123.24 = 1,340.80/x
  3. Step 3: Cross multiply
    1,424.32x = 2,123.24 × 1,340.80
  4. Step 4: Simplify right side
    1,424.32x = 2,846,840.19
  5. Step 5: Solve for x
    x = 2,846,840.19/1,424.32
  6. Step 6: Final answer
    x = 1,998.74

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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.