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Finding the Fourth Proportional to 6,440.88, 8,889.13 and 3,608.72

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Solution

The fourth proportional to 6,440.88, 8,889.13 and 3,608.72 is: 4,980.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,440.88 : 8,889.13 = 3,608.72 : x
  2. Step 2: Convert to fraction form
    6,440.88/8,889.13 = 3,608.72/x
  3. Step 3: Cross multiply
    6,440.88x = 8,889.13 × 3,608.72
  4. Step 4: Simplify right side
    6,440.88x = 32,078,318.72
  5. Step 5: Solve for x
    x = 32,078,318.72/6,440.88
  6. Step 6: Final answer
    x = 4,980.42

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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.