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Finding the Fourth Proportional to 1,330.94, 1,992.30 and 984.68

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Solution

The fourth proportional to 1,330.94, 1,992.30 and 984.68 is: 1,473.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.94 : 1,992.30 = 984.68 : x
  2. Step 2: Convert to fraction form
    1,330.94/1,992.30 = 984.68/x
  3. Step 3: Cross multiply
    1,330.94x = 1,992.30 × 984.68
  4. Step 4: Simplify right side
    1,330.94x = 1,961,777.96
  5. Step 5: Solve for x
    x = 1,961,777.96/1,330.94
  6. Step 6: Final answer
    x = 1,473.98

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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.