Home / 1,455.12-2,171.43-1,299.37

Finding the Fourth Proportional to 1,455.12, 2,171.43 and 1,299.37

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Solution

The fourth proportional to 1,455.12, 2,171.43 and 1,299.37 is: 1,939.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.12 : 2,171.43 = 1,299.37 : x
  2. Step 2: Convert to fraction form
    1,455.12/2,171.43 = 1,299.37/x
  3. Step 3: Cross multiply
    1,455.12x = 2,171.43 × 1,299.37
  4. Step 4: Simplify right side
    1,455.12x = 2,821,491.00
  5. Step 5: Solve for x
    x = 2,821,491.00/1,455.12
  6. Step 6: Final answer
    x = 1,939.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.