Home / 3,390.21-4,678.70-2,211.26

Finding the Fourth Proportional to 3,390.21, 4,678.70 and 2,211.26

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Solution

The fourth proportional to 3,390.21, 4,678.70 and 2,211.26 is: 3,051.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.21 : 4,678.70 = 2,211.26 : x
  2. Step 2: Convert to fraction form
    3,390.21/4,678.70 = 2,211.26/x
  3. Step 3: Cross multiply
    3,390.21x = 4,678.70 × 2,211.26
  4. Step 4: Simplify right side
    3,390.21x = 10,345,787.71
  5. Step 5: Solve for x
    x = 10,345,787.71/3,390.21
  6. Step 6: Final answer
    x = 3,051.67

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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.