Home / 3,878.20-5,354.68-2,386.60

Finding the Fourth Proportional to 3,878.20, 5,354.68 and 2,386.60

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Solution

The fourth proportional to 3,878.20, 5,354.68 and 2,386.60 is: 3,295.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.20 : 5,354.68 = 2,386.60 : x
  2. Step 2: Convert to fraction form
    3,878.20/5,354.68 = 2,386.60/x
  3. Step 3: Cross multiply
    3,878.20x = 5,354.68 × 2,386.60
  4. Step 4: Simplify right side
    3,878.20x = 12,779,479.29
  5. Step 5: Solve for x
    x = 12,779,479.29/3,878.20
  6. Step 6: Final answer
    x = 3,295.21

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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.