Home / 1,515.33-2,091.88-1,018.33

Finding the Fourth Proportional to 1,515.33, 2,091.88 and 1,018.33

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Solution

The fourth proportional to 1,515.33, 2,091.88 and 1,018.33 is: 1,405.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.33 : 2,091.88 = 1,018.33 : x
  2. Step 2: Convert to fraction form
    1,515.33/2,091.88 = 1,018.33/x
  3. Step 3: Cross multiply
    1,515.33x = 2,091.88 × 1,018.33
  4. Step 4: Simplify right side
    1,515.33x = 2,130,224.16
  5. Step 5: Solve for x
    x = 2,130,224.16/1,515.33
  6. Step 6: Final answer
    x = 1,405.78

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1.5x scale

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.