Home / 1,915.31-2,647.91-1,619.93

Finding the Fourth Proportional to 1,915.31, 2,647.91 and 1,619.93

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Solution

The fourth proportional to 1,915.31, 2,647.91 and 1,619.93 is: 2,239.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.31 : 2,647.91 = 1,619.93 : x
  2. Step 2: Convert to fraction form
    1,915.31/2,647.91 = 1,619.93/x
  3. Step 3: Cross multiply
    1,915.31x = 2,647.91 × 1,619.93
  4. Step 4: Simplify right side
    1,915.31x = 4,289,420.75
  5. Step 5: Solve for x
    x = 4,289,420.75/1,915.31
  6. Step 6: Final answer
    x = 2,239.54

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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.