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Finding the Fourth Proportional to 3,222.40, 4,390.24 and 3,222.40

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Solution

The fourth proportional to 3,222.40, 4,390.24 and 3,222.40 is: 4,390.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,222.40 : 4,390.24 = 3,222.40 : x
  2. Step 2: Convert to fraction form
    3,222.40/4,390.24 = 3,222.40/x
  3. Step 3: Cross multiply
    3,222.40x = 4,390.24 × 3,222.40
  4. Step 4: Simplify right side
    3,222.40x = 14,147,109.38
  5. Step 5: Solve for x
    x = 14,147,109.38/3,222.40
  6. Step 6: Final answer
    x = 4,390.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.