Home / 3,397.20-4,688.36-1,905.21

Finding the Fourth Proportional to 3,397.20, 4,688.36 and 1,905.21

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Solution

The fourth proportional to 3,397.20, 4,688.36 and 1,905.21 is: 2,629.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,397.20 : 4,688.36 = 1,905.21 : x
  2. Step 2: Convert to fraction form
    3,397.20/4,688.36 = 1,905.21/x
  3. Step 3: Cross multiply
    3,397.20x = 4,688.36 × 1,905.21
  4. Step 4: Simplify right side
    3,397.20x = 8,932,322.08
  5. Step 5: Solve for x
    x = 8,932,322.08/3,397.20
  6. Step 6: Final answer
    x = 2,629.32

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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.