Home / 1,515.13-2,091.05-843.00

Finding the Fourth Proportional to 1,515.13, 2,091.05 and 843.00

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Solution

The fourth proportional to 1,515.13, 2,091.05 and 843.00 is: 1,163.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.13 : 2,091.05 = 843.00 : x
  2. Step 2: Convert to fraction form
    1,515.13/2,091.05 = 843.00/x
  3. Step 3: Cross multiply
    1,515.13x = 2,091.05 × 843.00
  4. Step 4: Simplify right side
    1,515.13x = 1,762,740.48
  5. Step 5: Solve for x
    x = 1,762,740.48/1,515.13
  6. Step 6: Final answer
    x = 1,163.43

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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.