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Finding the Fourth Proportional to 1,325.85, 1,830.72 and 1,076.78

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Solution

The fourth proportional to 1,325.85, 1,830.72 and 1,076.78 is: 1,486.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.85 : 1,830.72 = 1,076.78 : x
  2. Step 2: Convert to fraction form
    1,325.85/1,830.72 = 1,076.78/x
  3. Step 3: Cross multiply
    1,325.85x = 1,830.72 × 1,076.78
  4. Step 4: Simplify right side
    1,325.85x = 1,971,282.68
  5. Step 5: Solve for x
    x = 1,971,282.68/1,325.85
  6. Step 6: Final answer
    x = 1,486.81

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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.