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Finding the Fourth Proportional to 2,174.54, 2,998.89 and 1,428.23

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Solution

The fourth proportional to 2,174.54, 2,998.89 and 1,428.23 is: 1,969.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.54 : 2,998.89 = 1,428.23 : x
  2. Step 2: Convert to fraction form
    2,174.54/2,998.89 = 1,428.23/x
  3. Step 3: Cross multiply
    2,174.54x = 2,998.89 × 1,428.23
  4. Step 4: Simplify right side
    2,174.54x = 4,283,112.16
  5. Step 5: Solve for x
    x = 4,283,112.16/2,174.54
  6. Step 6: Final answer
    x = 1,969.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.