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Finding the Fourth Proportional to 3,069.56, 4,236 and 1,672.40

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Solution

The fourth proportional to 3,069.56, 4,236 and 1,672.40 is: 2,307.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,069.56 : 4,236 = 1,672.40 : x
  2. Step 2: Convert to fraction form
    3,069.56/4,236 = 1,672.40/x
  3. Step 3: Cross multiply
    3,069.56x = 4,236 × 1,672.40
  4. Step 4: Simplify right side
    3,069.56x = 7,084,286.40
  5. Step 5: Solve for x
    x = 7,084,286.40/3,069.56
  6. Step 6: Final answer
    x = 2,307.92

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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.