Home / 3,421.88-5,131.28-1,230.63

Finding the Fourth Proportional to 3,421.88, 5,131.28 and 1,230.63

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Solution

The fourth proportional to 3,421.88, 5,131.28 and 1,230.63 is: 1,845.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.88 : 5,131.28 = 1,230.63 : x
  2. Step 2: Convert to fraction form
    3,421.88/5,131.28 = 1,230.63/x
  3. Step 3: Cross multiply
    3,421.88x = 5,131.28 × 1,230.63
  4. Step 4: Simplify right side
    3,421.88x = 6,314,707.11
  5. Step 5: Solve for x
    x = 6,314,707.11/3,421.88
  6. Step 6: Final answer
    x = 1,845.39

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1.5x scale

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.