Home / 3,318-4,974.48-1,126.20

Finding the Fourth Proportional to 3,318, 4,974.48 and 1,126.20

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Solution

The fourth proportional to 3,318, 4,974.48 and 1,126.20 is: 1,688.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318 : 4,974.48 = 1,126.20 : x
  2. Step 2: Convert to fraction form
    3,318/4,974.48 = 1,126.20/x
  3. Step 3: Cross multiply
    3,318x = 4,974.48 × 1,126.20
  4. Step 4: Simplify right side
    3,318x = 5,602,259.38
  5. Step 5: Solve for x
    x = 5,602,259.38/3,318
  6. Step 6: Final answer
    x = 1,688.44

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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.