Home / 1,985.21-2,735.14-1,664.86

Finding the Fourth Proportional to 1,985.21, 2,735.14 and 1,664.86

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Solution

The fourth proportional to 1,985.21, 2,735.14 and 1,664.86 is: 2,293.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.21 : 2,735.14 = 1,664.86 : x
  2. Step 2: Convert to fraction form
    1,985.21/2,735.14 = 1,664.86/x
  3. Step 3: Cross multiply
    1,985.21x = 2,735.14 × 1,664.86
  4. Step 4: Simplify right side
    1,985.21x = 4,553,625.18
  5. Step 5: Solve for x
    x = 4,553,625.18/1,985.21
  6. Step 6: Final answer
    x = 2,293.78

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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.