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Finding the Fourth Proportional to 6,239.88, 8,611.14 and 3,407.40

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Solution

The fourth proportional to 6,239.88, 8,611.14 and 3,407.40 is: 4,702.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,239.88 : 8,611.14 = 3,407.40 : x
  2. Step 2: Convert to fraction form
    6,239.88/8,611.14 = 3,407.40/x
  3. Step 3: Cross multiply
    6,239.88x = 8,611.14 × 3,407.40
  4. Step 4: Simplify right side
    6,239.88x = 29,341,598.44
  5. Step 5: Solve for x
    x = 29,341,598.44/6,239.88
  6. Step 6: Final answer
    x = 4,702.27

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Half scale
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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.