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Finding the Fourth Proportional to 3,992.48, 5,988.86 and 1,218.93

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Solution

The fourth proportional to 3,992.48, 5,988.86 and 1,218.93 is: 1,828.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.48 : 5,988.86 = 1,218.93 : x
  2. Step 2: Convert to fraction form
    3,992.48/5,988.86 = 1,218.93/x
  3. Step 3: Cross multiply
    3,992.48x = 5,988.86 × 1,218.93
  4. Step 4: Simplify right side
    3,992.48x = 7,299,995.03
  5. Step 5: Solve for x
    x = 7,299,995.03/3,992.48
  6. Step 6: Final answer
    x = 1,828.44

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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.