Home / 3,830.70-5,740.65-1,878.60

Finding the Fourth Proportional to 3,830.70, 5,740.65 and 1,878.60

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Solution

The fourth proportional to 3,830.70, 5,740.65 and 1,878.60 is: 2,815.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,830.70 : 5,740.65 = 1,878.60 : x
  2. Step 2: Convert to fraction form
    3,830.70/5,740.65 = 1,878.60/x
  3. Step 3: Cross multiply
    3,830.70x = 5,740.65 × 1,878.60
  4. Step 4: Simplify right side
    3,830.70x = 10,784,385.09
  5. Step 5: Solve for x
    x = 10,784,385.09/3,830.70
  6. Step 6: Final answer
    x = 2,815.25

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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.