Home / 1,638.81-2,458.30-1,555.77

Finding the Fourth Proportional to 1,638.81, 2,458.30 and 1,555.77

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Solution

The fourth proportional to 1,638.81, 2,458.30 and 1,555.77 is: 2,333.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.81 : 2,458.30 = 1,555.77 : x
  2. Step 2: Convert to fraction form
    1,638.81/2,458.30 = 1,555.77/x
  3. Step 3: Cross multiply
    1,638.81x = 2,458.30 × 1,555.77
  4. Step 4: Simplify right side
    1,638.81x = 3,824,553.28
  5. Step 5: Solve for x
    x = 3,824,553.28/1,638.81
  6. Step 6: Final answer
    x = 2,333.73

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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.