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Finding the Fourth Proportional to 3,992.33, 5,988.36 and 1,218.89

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Solution

The fourth proportional to 3,992.33, 5,988.36 and 1,218.89 is: 1,828.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.33 : 5,988.36 = 1,218.89 : x
  2. Step 2: Convert to fraction form
    3,992.33/5,988.36 = 1,218.89/x
  3. Step 3: Cross multiply
    3,992.33x = 5,988.36 × 1,218.89
  4. Step 4: Simplify right side
    3,992.33x = 7,299,152.12
  5. Step 5: Solve for x
    x = 7,299,152.12/3,992.33
  6. Step 6: Final answer
    x = 1,828.29

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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.