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Finding the Fourth Proportional to 3,783.22, 5,674.80 and 1,318

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Solution

The fourth proportional to 3,783.22, 5,674.80 and 1,318 is: 1,976.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,783.22 : 5,674.80 = 1,318 : x
  2. Step 2: Convert to fraction form
    3,783.22/5,674.80 = 1,318/x
  3. Step 3: Cross multiply
    3,783.22x = 5,674.80 × 1,318
  4. Step 4: Simplify right side
    3,783.22x = 7,479,386.40
  5. Step 5: Solve for x
    x = 7,479,386.40/3,783.22
  6. Step 6: Final answer
    x = 1,976.99

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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.