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Finding the Fourth Proportional to 1,992.01, 2,988.03 and 1,124.50

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Solution

The fourth proportional to 1,992.01, 2,988.03 and 1,124.50 is: 1,686.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.01 : 2,988.03 = 1,124.50 : x
  2. Step 2: Convert to fraction form
    1,992.01/2,988.03 = 1,124.50/x
  3. Step 3: Cross multiply
    1,992.01x = 2,988.03 × 1,124.50
  4. Step 4: Simplify right side
    1,992.01x = 3,360,039.74
  5. Step 5: Solve for x
    x = 3,360,039.74/1,992.01
  6. Step 6: Final answer
    x = 1,686.76

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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.