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Finding the Fourth Proportional to 7,222.68, 9,964.35 and 4,390.11

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Solution

The fourth proportional to 7,222.68, 9,964.35 and 4,390.11 is: 6,056.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,222.68 : 9,964.35 = 4,390.11 : x
  2. Step 2: Convert to fraction form
    7,222.68/9,964.35 = 4,390.11/x
  3. Step 3: Cross multiply
    7,222.68x = 9,964.35 × 4,390.11
  4. Step 4: Simplify right side
    7,222.68x = 43,744,592.58
  5. Step 5: Solve for x
    x = 43,744,592.58/7,222.68
  6. Step 6: Final answer
    x = 6,056.56

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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.