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Finding the Fourth Proportional to 1,861.53, 2,792.40 and 822.02

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Solution

The fourth proportional to 1,861.53, 2,792.40 and 822.02 is: 1,233.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.53 : 2,792.40 = 822.02 : x
  2. Step 2: Convert to fraction form
    1,861.53/2,792.40 = 822.02/x
  3. Step 3: Cross multiply
    1,861.53x = 2,792.40 × 822.02
  4. Step 4: Simplify right side
    1,861.53x = 2,295,408.65
  5. Step 5: Solve for x
    x = 2,295,408.65/1,861.53
  6. Step 6: Final answer
    x = 1,233.08

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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.