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Finding the Fourth Proportional to 1,975.92, 2,718.90 and 1,915.80

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Solution

The fourth proportional to 1,975.92, 2,718.90 and 1,915.80 is: 2,636.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,975.92 : 2,718.90 = 1,915.80 : x
  2. Step 2: Convert to fraction form
    1,975.92/2,718.90 = 1,915.80/x
  3. Step 3: Cross multiply
    1,975.92x = 2,718.90 × 1,915.80
  4. Step 4: Simplify right side
    1,975.92x = 5,208,868.62
  5. Step 5: Solve for x
    x = 5,208,868.62/1,975.92
  6. Step 6: Final answer
    x = 2,636.17

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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.