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Finding the Fourth Proportional to 3,307.89, 4,955.22 and 1,990.92

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Solution

The fourth proportional to 3,307.89, 4,955.22 and 1,990.92 is: 2,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,307.89 : 4,955.22 = 1,990.92 : x
  2. Step 2: Convert to fraction form
    3,307.89/4,955.22 = 1,990.92/x
  3. Step 3: Cross multiply
    3,307.89x = 4,955.22 × 1,990.92
  4. Step 4: Simplify right side
    3,307.89x = 9,865,446.60
  5. Step 5: Solve for x
    x = 9,865,446.60/3,307.89
  6. Step 6: Final answer
    x = 2,982.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.