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Finding the Fourth Proportional to 2,187.56, 3,018.66 and 1,401.50

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Solution

The fourth proportional to 2,187.56, 3,018.66 and 1,401.50 is: 1,933.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.56 : 3,018.66 = 1,401.50 : x
  2. Step 2: Convert to fraction form
    2,187.56/3,018.66 = 1,401.50/x
  3. Step 3: Cross multiply
    2,187.56x = 3,018.66 × 1,401.50
  4. Step 4: Simplify right side
    2,187.56x = 4,230,651.99
  5. Step 5: Solve for x
    x = 4,230,651.99/2,187.56
  6. Step 6: Final answer
    x = 1,933.96

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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.