Home / 3,421.80-4,731.30-2,984.40

Finding the Fourth Proportional to 3,421.80, 4,731.30 and 2,984.40

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Solution

The fourth proportional to 3,421.80, 4,731.30 and 2,984.40 is: 4,126.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.80 : 4,731.30 = 2,984.40 : x
  2. Step 2: Convert to fraction form
    3,421.80/4,731.30 = 2,984.40/x
  3. Step 3: Cross multiply
    3,421.80x = 4,731.30 × 2,984.40
  4. Step 4: Simplify right side
    3,421.80x = 14,120,091.72
  5. Step 5: Solve for x
    x = 14,120,091.72/3,421.80
  6. Step 6: Final answer
    x = 4,126.51

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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.