Home / 1,283.75-1,915.55-1,205.39

Finding the Fourth Proportional to 1,283.75, 1,915.55 and 1,205.39

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Solution

The fourth proportional to 1,283.75, 1,915.55 and 1,205.39 is: 1,798.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.75 : 1,915.55 = 1,205.39 : x
  2. Step 2: Convert to fraction form
    1,283.75/1,915.55 = 1,205.39/x
  3. Step 3: Cross multiply
    1,283.75x = 1,915.55 × 1,205.39
  4. Step 4: Simplify right side
    1,283.75x = 2,308,969.21
  5. Step 5: Solve for x
    x = 2,308,969.21/1,283.75
  6. Step 6: Final answer
    x = 1,798.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.