Home / 1,428.84-2,145.08-1,331.95

Finding the Fourth Proportional to 1,428.84, 2,145.08 and 1,331.95

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Solution

The fourth proportional to 1,428.84, 2,145.08 and 1,331.95 is: 1,999.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.84 : 2,145.08 = 1,331.95 : x
  2. Step 2: Convert to fraction form
    1,428.84/2,145.08 = 1,331.95/x
  3. Step 3: Cross multiply
    1,428.84x = 2,145.08 × 1,331.95
  4. Step 4: Simplify right side
    1,428.84x = 2,857,139.31
  5. Step 5: Solve for x
    x = 2,857,139.31/1,428.84
  6. Step 6: Final answer
    x = 1,999.62

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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.