Home / 2,818.40-3,888.44-1,638.50

Finding the Fourth Proportional to 2,818.40, 3,888.44 and 1,638.50

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Solution

The fourth proportional to 2,818.40, 3,888.44 and 1,638.50 is: 2,260.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.40 : 3,888.44 = 1,638.50 : x
  2. Step 2: Convert to fraction form
    2,818.40/3,888.44 = 1,638.50/x
  3. Step 3: Cross multiply
    2,818.40x = 3,888.44 × 1,638.50
  4. Step 4: Simplify right side
    2,818.40x = 6,371,208.94
  5. Step 5: Solve for x
    x = 6,371,208.94/2,818.40
  6. Step 6: Final answer
    x = 2,260.58

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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.