Home / 2,415.78-3,615.84-1,317.42

Finding the Fourth Proportional to 2,415.78, 3,615.84 and 1,317.42

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Solution

The fourth proportional to 2,415.78, 3,615.84 and 1,317.42 is: 1,971.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.78 : 3,615.84 = 1,317.42 : x
  2. Step 2: Convert to fraction form
    2,415.78/3,615.84 = 1,317.42/x
  3. Step 3: Cross multiply
    2,415.78x = 3,615.84 × 1,317.42
  4. Step 4: Simplify right side
    2,415.78x = 4,763,579.93
  5. Step 5: Solve for x
    x = 4,763,579.93/2,415.78
  6. Step 6: Final answer
    x = 1,971.86

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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.