Home / 1,639.88-2,262.98-977.04

Finding the Fourth Proportional to 1,639.88, 2,262.98 and 977.04

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Solution

The fourth proportional to 1,639.88, 2,262.98 and 977.04 is: 1,348.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.88 : 2,262.98 = 977.04 : x
  2. Step 2: Convert to fraction form
    1,639.88/2,262.98 = 977.04/x
  3. Step 3: Cross multiply
    1,639.88x = 2,262.98 × 977.04
  4. Step 4: Simplify right side
    1,639.88x = 2,211,021.98
  5. Step 5: Solve for x
    x = 2,211,021.98/1,639.88
  6. Step 6: Final answer
    x = 1,348.28

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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.