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Finding the Fourth Proportional to 1,300.11, 1,792.35 and 879.80

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Solution

The fourth proportional to 1,300.11, 1,792.35 and 879.80 is: 1,212.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,300.11 : 1,792.35 = 879.80 : x
  2. Step 2: Convert to fraction form
    1,300.11/1,792.35 = 879.80/x
  3. Step 3: Cross multiply
    1,300.11x = 1,792.35 × 879.80
  4. Step 4: Simplify right side
    1,300.11x = 1,576,900.57
  5. Step 5: Solve for x
    x = 1,576,900.57/1,300.11
  6. Step 6: Final answer
    x = 1,212.90

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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.