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Finding the Fourth Proportional to 2,143.99, 3,216.99 and 758.38

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Solution

The fourth proportional to 2,143.99, 3,216.99 and 758.38 is: 1,137.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.99 : 3,216.99 = 758.38 : x
  2. Step 2: Convert to fraction form
    2,143.99/3,216.99 = 758.38/x
  3. Step 3: Cross multiply
    2,143.99x = 3,216.99 × 758.38
  4. Step 4: Simplify right side
    2,143.99x = 2,439,681.00
  5. Step 5: Solve for x
    x = 2,439,681.00/2,143.99
  6. Step 6: Final answer
    x = 1,137.92

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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.