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Finding the Fourth Proportional to 3,305.40, 4,561.02 and 1,978.62

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Solution

The fourth proportional to 3,305.40, 4,561.02 and 1,978.62 is: 2,730.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,305.40 : 4,561.02 = 1,978.62 : x
  2. Step 2: Convert to fraction form
    3,305.40/4,561.02 = 1,978.62/x
  3. Step 3: Cross multiply
    3,305.40x = 4,561.02 × 1,978.62
  4. Step 4: Simplify right side
    3,305.40x = 9,024,525.39
  5. Step 5: Solve for x
    x = 9,024,525.39/3,305.40
  6. Step 6: Final answer
    x = 2,730.24

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1.5x scale

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.