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Finding the Fourth Proportional to 2,998.12, 4,138.88 and 2,058.88

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Solution

The fourth proportional to 2,998.12, 4,138.88 and 2,058.88 is: 2,842.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,998.12 : 4,138.88 = 2,058.88 : x
  2. Step 2: Convert to fraction form
    2,998.12/4,138.88 = 2,058.88/x
  3. Step 3: Cross multiply
    2,998.12x = 4,138.88 × 2,058.88
  4. Step 4: Simplify right side
    2,998.12x = 8,521,457.25
  5. Step 5: Solve for x
    x = 8,521,457.25/2,998.12
  6. Step 6: Final answer
    x = 2,842.27

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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.