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Finding the Fourth Proportional to 3,486.70, 4,811.43 and 3,208.06

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Solution

The fourth proportional to 3,486.70, 4,811.43 and 3,208.06 is: 4,426.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.70 : 4,811.43 = 3,208.06 : x
  2. Step 2: Convert to fraction form
    3,486.70/4,811.43 = 3,208.06/x
  3. Step 3: Cross multiply
    3,486.70x = 4,811.43 × 3,208.06
  4. Step 4: Simplify right side
    3,486.70x = 15,435,356.13
  5. Step 5: Solve for x
    x = 15,435,356.13/3,486.70
  6. Step 6: Final answer
    x = 4,426.92

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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.