Home / 1,639.03-2,458.56-484.78

Finding the Fourth Proportional to 1,639.03, 2,458.56 and 484.78

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Solution

The fourth proportional to 1,639.03, 2,458.56 and 484.78 is: 727.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.03 : 2,458.56 = 484.78 : x
  2. Step 2: Convert to fraction form
    1,639.03/2,458.56 = 484.78/x
  3. Step 3: Cross multiply
    1,639.03x = 2,458.56 × 484.78
  4. Step 4: Simplify right side
    1,639.03x = 1,191,860.72
  5. Step 5: Solve for x
    x = 1,191,860.72/1,639.03
  6. Step 6: Final answer
    x = 727.17

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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.