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Finding the Fourth Proportional to 4,455.72, 6,683.22 and 1,990.68

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Solution

The fourth proportional to 4,455.72, 6,683.22 and 1,990.68 is: 2,985.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,455.72 : 6,683.22 = 1,990.68 : x
  2. Step 2: Convert to fraction form
    4,455.72/6,683.22 = 1,990.68/x
  3. Step 3: Cross multiply
    4,455.72x = 6,683.22 × 1,990.68
  4. Step 4: Simplify right side
    4,455.72x = 13,304,152.39
  5. Step 5: Solve for x
    x = 13,304,152.39/4,455.72
  6. Step 6: Final answer
    x = 2,985.86

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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.