Home / 1,911.51-2,867.31-612.98

Finding the Fourth Proportional to 1,911.51, 2,867.31 and 612.98

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Solution

The fourth proportional to 1,911.51, 2,867.31 and 612.98 is: 919.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.51 : 2,867.31 = 612.98 : x
  2. Step 2: Convert to fraction form
    1,911.51/2,867.31 = 612.98/x
  3. Step 3: Cross multiply
    1,911.51x = 2,867.31 × 612.98
  4. Step 4: Simplify right side
    1,911.51x = 1,757,603.68
  5. Step 5: Solve for x
    x = 1,757,603.68/1,911.51
  6. Step 6: Final answer
    x = 919.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.