Home / 2,163-2,985.30-1,638.12

Finding the Fourth Proportional to 2,163, 2,985.30 and 1,638.12

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Solution

The fourth proportional to 2,163, 2,985.30 and 1,638.12 is: 2,260.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163 : 2,985.30 = 1,638.12 : x
  2. Step 2: Convert to fraction form
    2,163/2,985.30 = 1,638.12/x
  3. Step 3: Cross multiply
    2,163x = 2,985.30 × 1,638.12
  4. Step 4: Simplify right side
    2,163x = 4,890,279.64
  5. Step 5: Solve for x
    x = 4,890,279.64/2,163
  6. Step 6: Final answer
    x = 2,260.88

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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.