Home / 4,090.12-6,131.93-1,780

Finding the Fourth Proportional to 4,090.12, 6,131.93 and 1,780

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Solution

The fourth proportional to 4,090.12, 6,131.93 and 1,780 is: 2,668.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,090.12 : 6,131.93 = 1,780 : x
  2. Step 2: Convert to fraction form
    4,090.12/6,131.93 = 1,780/x
  3. Step 3: Cross multiply
    4,090.12x = 6,131.93 × 1,780
  4. Step 4: Simplify right side
    4,090.12x = 10,914,835.40
  5. Step 5: Solve for x
    x = 10,914,835.40/4,090.12
  6. Step 6: Final answer
    x = 2,668.59

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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.