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Finding the Fourth Proportional to 3,338.74, 4,609.20 and 3,117.88

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Solution

The fourth proportional to 3,338.74, 4,609.20 and 3,117.88 is: 4,304.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,338.74 : 4,609.20 = 3,117.88 : x
  2. Step 2: Convert to fraction form
    3,338.74/4,609.20 = 3,117.88/x
  3. Step 3: Cross multiply
    3,338.74x = 4,609.20 × 3,117.88
  4. Step 4: Simplify right side
    3,338.74x = 14,370,932.50
  5. Step 5: Solve for x
    x = 14,370,932.50/3,338.74
  6. Step 6: Final answer
    x = 4,304.30

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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.