Home / 1,915.72-2,643.74-1,076.48

Finding the Fourth Proportional to 1,915.72, 2,643.74 and 1,076.48

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Solution

The fourth proportional to 1,915.72, 2,643.74 and 1,076.48 is: 1,485.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.72 : 2,643.74 = 1,076.48 : x
  2. Step 2: Convert to fraction form
    1,915.72/2,643.74 = 1,076.48/x
  3. Step 3: Cross multiply
    1,915.72x = 2,643.74 × 1,076.48
  4. Step 4: Simplify right side
    1,915.72x = 2,845,933.24
  5. Step 5: Solve for x
    x = 2,845,933.24/1,915.72
  6. Step 6: Final answer
    x = 1,485.57

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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.