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Finding the Fourth Proportional to 3,650.80, 5,465.40 and 3,218.80

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Solution

The fourth proportional to 3,650.80, 5,465.40 and 3,218.80 is: 4,818.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,650.80 : 5,465.40 = 3,218.80 : x
  2. Step 2: Convert to fraction form
    3,650.80/5,465.40 = 3,218.80/x
  3. Step 3: Cross multiply
    3,650.80x = 5,465.40 × 3,218.80
  4. Step 4: Simplify right side
    3,650.80x = 17,592,029.52
  5. Step 5: Solve for x
    x = 17,592,029.52/3,650.80
  6. Step 6: Final answer
    x = 4,818.68

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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.