Home / 1,380.81-2,065.95-1,214.94

Finding the Fourth Proportional to 1,380.81, 2,065.95 and 1,214.94

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Solution

The fourth proportional to 1,380.81, 2,065.95 and 1,214.94 is: 1,817.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.81 : 2,065.95 = 1,214.94 : x
  2. Step 2: Convert to fraction form
    1,380.81/2,065.95 = 1,214.94/x
  3. Step 3: Cross multiply
    1,380.81x = 2,065.95 × 1,214.94
  4. Step 4: Simplify right side
    1,380.81x = 2,510,005.29
  5. Step 5: Solve for x
    x = 2,510,005.29/1,380.81
  6. Step 6: Final answer
    x = 1,817.78

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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.