Home / 1,632.40-2,448.60-399.81

Finding the Fourth Proportional to 1,632.40, 2,448.60 and 399.81

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Solution

The fourth proportional to 1,632.40, 2,448.60 and 399.81 is: 599.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,632.40 : 2,448.60 = 399.81 : x
  2. Step 2: Convert to fraction form
    1,632.40/2,448.60 = 399.81/x
  3. Step 3: Cross multiply
    1,632.40x = 2,448.60 × 399.81
  4. Step 4: Simplify right side
    1,632.40x = 978,974.77
  5. Step 5: Solve for x
    x = 978,974.77/1,632.40
  6. Step 6: Final answer
    x = 599.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.