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Finding the Fourth Proportional to 1,792.42, 2,690.20 and 1,245

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Solution

The fourth proportional to 1,792.42, 2,690.20 and 1,245 is: 1,868.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,792.42 : 2,690.20 = 1,245 : x
  2. Step 2: Convert to fraction form
    1,792.42/2,690.20 = 1,245/x
  3. Step 3: Cross multiply
    1,792.42x = 2,690.20 × 1,245
  4. Step 4: Simplify right side
    1,792.42x = 3,349,299
  5. Step 5: Solve for x
    x = 3,349,299/1,792.42
  6. Step 6: Final answer
    x = 1,868.59

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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.