Home / 2,145.25-3,218.13-758.30

Finding the Fourth Proportional to 2,145.25, 3,218.13 and 758.30

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Solution

The fourth proportional to 2,145.25, 3,218.13 and 758.30 is: 1,137.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.25 : 3,218.13 = 758.30 : x
  2. Step 2: Convert to fraction form
    2,145.25/3,218.13 = 758.30/x
  3. Step 3: Cross multiply
    2,145.25x = 3,218.13 × 758.30
  4. Step 4: Simplify right side
    2,145.25x = 2,440,307.98
  5. Step 5: Solve for x
    x = 2,440,307.98/2,145.25
  6. Step 6: Final answer
    x = 1,137.54

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1.5x scale

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.