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Finding the Fourth Proportional to 3,421.80, 5,133.90 and 3,301.80

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Solution

The fourth proportional to 3,421.80, 5,133.90 and 3,301.80 is: 4,953.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.80 : 5,133.90 = 3,301.80 : x
  2. Step 2: Convert to fraction form
    3,421.80/5,133.90 = 3,301.80/x
  3. Step 3: Cross multiply
    3,421.80x = 5,133.90 × 3,301.80
  4. Step 4: Simplify right side
    3,421.80x = 16,951,111.02
  5. Step 5: Solve for x
    x = 16,951,111.02/3,421.80
  6. Step 6: Final answer
    x = 4,953.86

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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.