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Finding the Fourth Proportional to 3,903.80, 5,392.30 and 3,162.68

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Solution

The fourth proportional to 3,903.80, 5,392.30 and 3,162.68 is: 4,368.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903.80 : 5,392.30 = 3,162.68 : x
  2. Step 2: Convert to fraction form
    3,903.80/5,392.30 = 3,162.68/x
  3. Step 3: Cross multiply
    3,903.80x = 5,392.30 × 3,162.68
  4. Step 4: Simplify right side
    3,903.80x = 17,054,119.36
  5. Step 5: Solve for x
    x = 17,054,119.36/3,903.80
  6. Step 6: Final answer
    x = 4,368.59

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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.