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Finding the Fourth Proportional to 3,980.24, 5,971.21 and 1,207.12

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Solution

The fourth proportional to 3,980.24, 5,971.21 and 1,207.12 is: 1,810.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.24 : 5,971.21 = 1,207.12 : x
  2. Step 2: Convert to fraction form
    3,980.24/5,971.21 = 1,207.12/x
  3. Step 3: Cross multiply
    3,980.24x = 5,971.21 × 1,207.12
  4. Step 4: Simplify right side
    3,980.24x = 7,207,967.02
  5. Step 5: Solve for x
    x = 7,207,967.02/3,980.24
  6. Step 6: Final answer
    x = 1,810.94

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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.