Home / 1,298.28-1,787.60-1,013.96

Finding the Fourth Proportional to 1,298.28, 1,787.60 and 1,013.96

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Solution

The fourth proportional to 1,298.28, 1,787.60 and 1,013.96 is: 1,396.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.28 : 1,787.60 = 1,013.96 : x
  2. Step 2: Convert to fraction form
    1,298.28/1,787.60 = 1,013.96/x
  3. Step 3: Cross multiply
    1,298.28x = 1,787.60 × 1,013.96
  4. Step 4: Simplify right side
    1,298.28x = 1,812,554.90
  5. Step 5: Solve for x
    x = 1,812,554.90/1,298.28
  6. Step 6: Final answer
    x = 1,396.12

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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.