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Finding the Fourth Proportional to 4,927.88, 7,390.22 and 1,640.09

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Solution

The fourth proportional to 4,927.88, 7,390.22 and 1,640.09 is: 2,459.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,927.88 : 7,390.22 = 1,640.09 : x
  2. Step 2: Convert to fraction form
    4,927.88/7,390.22 = 1,640.09/x
  3. Step 3: Cross multiply
    4,927.88x = 7,390.22 × 1,640.09
  4. Step 4: Simplify right side
    4,927.88x = 12,120,580.77
  5. Step 5: Solve for x
    x = 12,120,580.77/4,927.88
  6. Step 6: Final answer
    x = 2,459.60

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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.