Home / 1,015.13-1,400.67-611.15

Finding the Fourth Proportional to 1,015.13, 1,400.67 and 611.15

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Solution

The fourth proportional to 1,015.13, 1,400.67 and 611.15 is: 843.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.13 : 1,400.67 = 611.15 : x
  2. Step 2: Convert to fraction form
    1,015.13/1,400.67 = 611.15/x
  3. Step 3: Cross multiply
    1,015.13x = 1,400.67 × 611.15
  4. Step 4: Simplify right side
    1,015.13x = 856,010.75
  5. Step 5: Solve for x
    x = 856,010.75/1,015.13
  6. Step 6: Final answer
    x = 843.25

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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.