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Finding the Fourth Proportional to 3,530.55, 5,301.90 and 3,421.20

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Solution

The fourth proportional to 3,530.55, 5,301.90 and 3,421.20 is: 5,137.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,530.55 : 5,301.90 = 3,421.20 : x
  2. Step 2: Convert to fraction form
    3,530.55/5,301.90 = 3,421.20/x
  3. Step 3: Cross multiply
    3,530.55x = 5,301.90 × 3,421.20
  4. Step 4: Simplify right side
    3,530.55x = 18,138,860.28
  5. Step 5: Solve for x
    x = 18,138,860.28/3,530.55
  6. Step 6: Final answer
    x = 5,137.69

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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.