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Finding the Fourth Proportional to 3,369.70, 4,647.81 and 1,972.72

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Solution

The fourth proportional to 3,369.70, 4,647.81 and 1,972.72 is: 2,720.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,369.70 : 4,647.81 = 1,972.72 : x
  2. Step 2: Convert to fraction form
    3,369.70/4,647.81 = 1,972.72/x
  3. Step 3: Cross multiply
    3,369.70x = 4,647.81 × 1,972.72
  4. Step 4: Simplify right side
    3,369.70x = 9,168,827.74
  5. Step 5: Solve for x
    x = 9,168,827.74/3,369.70
  6. Step 6: Final answer
    x = 2,720.96

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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.