Home / 1,639.31-2,458.89-406.69

Finding the Fourth Proportional to 1,639.31, 2,458.89 and 406.69

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Solution

The fourth proportional to 1,639.31, 2,458.89 and 406.69 is: 610.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.31 : 2,458.89 = 406.69 : x
  2. Step 2: Convert to fraction form
    1,639.31/2,458.89 = 406.69/x
  3. Step 3: Cross multiply
    1,639.31x = 2,458.89 × 406.69
  4. Step 4: Simplify right side
    1,639.31x = 999,999.83
  5. Step 5: Solve for x
    x = 999,999.83/1,639.31
  6. Step 6: Final answer
    x = 610.01

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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.