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Finding the Fourth Proportional to 2,100.28, 2,899.38 and 1,402.12

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Solution

The fourth proportional to 2,100.28, 2,899.38 and 1,402.12 is: 1,935.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100.28 : 2,899.38 = 1,402.12 : x
  2. Step 2: Convert to fraction form
    2,100.28/2,899.38 = 1,402.12/x
  3. Step 3: Cross multiply
    2,100.28x = 2,899.38 × 1,402.12
  4. Step 4: Simplify right side
    2,100.28x = 4,065,278.69
  5. Step 5: Solve for x
    x = 4,065,278.69/2,100.28
  6. Step 6: Final answer
    x = 1,935.59

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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.