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Finding the Fourth Proportional to 6,239.99, 8,611.20 and 3,407.39

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Solution

The fourth proportional to 6,239.99, 8,611.20 and 3,407.39 is: 4,702.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,239.99 : 8,611.20 = 3,407.39 : x
  2. Step 2: Convert to fraction form
    6,239.99/8,611.20 = 3,407.39/x
  3. Step 3: Cross multiply
    6,239.99x = 8,611.20 × 3,407.39
  4. Step 4: Simplify right side
    6,239.99x = 29,341,739.81
  5. Step 5: Solve for x
    x = 29,341,739.81/6,239.99
  6. Step 6: Final answer
    x = 4,702.21

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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.