Home / 2,985.21-4,485.38-1,890.09

Finding the Fourth Proportional to 2,985.21, 4,485.38 and 1,890.09

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Solution

The fourth proportional to 2,985.21, 4,485.38 and 1,890.09 is: 2,839.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.21 : 4,485.38 = 1,890.09 : x
  2. Step 2: Convert to fraction form
    2,985.21/4,485.38 = 1,890.09/x
  3. Step 3: Cross multiply
    2,985.21x = 4,485.38 × 1,890.09
  4. Step 4: Simplify right side
    2,985.21x = 8,477,762.43
  5. Step 5: Solve for x
    x = 8,477,762.43/2,985.21
  6. Step 6: Final answer
    x = 2,839.92

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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.