Home / 2,103.21-2,901.24-1,218.89

Finding the Fourth Proportional to 2,103.21, 2,901.24 and 1,218.89

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Solution

The fourth proportional to 2,103.21, 2,901.24 and 1,218.89 is: 1,681.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,103.21 : 2,901.24 = 1,218.89 : x
  2. Step 2: Convert to fraction form
    2,103.21/2,901.24 = 1,218.89/x
  3. Step 3: Cross multiply
    2,103.21x = 2,901.24 × 1,218.89
  4. Step 4: Simplify right side
    2,103.21x = 3,536,299.68
  5. Step 5: Solve for x
    x = 3,536,299.68/2,103.21
  6. Step 6: Final answer
    x = 1,681.38

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Double scale
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1.5x scale

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.