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Finding the Fourth Proportional to 3,360.78, 5,041.80 and 1,020.60

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Solution

The fourth proportional to 3,360.78, 5,041.80 and 1,020.60 is: 1,531.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,360.78 : 5,041.80 = 1,020.60 : x
  2. Step 2: Convert to fraction form
    3,360.78/5,041.80 = 1,020.60/x
  3. Step 3: Cross multiply
    3,360.78x = 5,041.80 × 1,020.60
  4. Step 4: Simplify right side
    3,360.78x = 5,145,661.08
  5. Step 5: Solve for x
    x = 5,145,661.08/3,360.78
  6. Step 6: Final answer
    x = 1,531.09

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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.