Home / 1,974-2,962.35-1,278.94

Finding the Fourth Proportional to 1,974, 2,962.35 and 1,278.94

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Solution

The fourth proportional to 1,974, 2,962.35 and 1,278.94 is: 1,919.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974 : 2,962.35 = 1,278.94 : x
  2. Step 2: Convert to fraction form
    1,974/2,962.35 = 1,278.94/x
  3. Step 3: Cross multiply
    1,974x = 2,962.35 × 1,278.94
  4. Step 4: Simplify right side
    1,974x = 3,788,667.91
  5. Step 5: Solve for x
    x = 3,788,667.91/1,974
  6. Step 6: Final answer
    x = 1,919.28

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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.