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Finding the Fourth Proportional to 4,812.89, 7,222.22 and 4,421.21

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Solution

The fourth proportional to 4,812.89, 7,222.22 and 4,421.21 is: 6,634.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,812.89 : 7,222.22 = 4,421.21 : x
  2. Step 2: Convert to fraction form
    4,812.89/7,222.22 = 4,421.21/x
  3. Step 3: Cross multiply
    4,812.89x = 7,222.22 × 4,421.21
  4. Step 4: Simplify right side
    4,812.89x = 31,930,929.18
  5. Step 5: Solve for x
    x = 31,930,929.18/4,812.89
  6. Step 6: Final answer
    x = 6,634.46

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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.