Home / 1,639.80-2,262.38-976.28

Finding the Fourth Proportional to 1,639.80, 2,262.38 and 976.28

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Solution

The fourth proportional to 1,639.80, 2,262.38 and 976.28 is: 1,346.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.80 : 2,262.38 = 976.28 : x
  2. Step 2: Convert to fraction form
    1,639.80/2,262.38 = 976.28/x
  3. Step 3: Cross multiply
    1,639.80x = 2,262.38 × 976.28
  4. Step 4: Simplify right side
    1,639.80x = 2,208,700.15
  5. Step 5: Solve for x
    x = 2,208,700.15/1,639.80
  6. Step 6: Final answer
    x = 1,346.93

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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.