Home / 2,811.24-4,215.78-961.74

Finding the Fourth Proportional to 2,811.24, 4,215.78 and 961.74

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Solution

The fourth proportional to 2,811.24, 4,215.78 and 961.74 is: 1,442.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.24 : 4,215.78 = 961.74 : x
  2. Step 2: Convert to fraction form
    2,811.24/4,215.78 = 961.74/x
  3. Step 3: Cross multiply
    2,811.24x = 4,215.78 × 961.74
  4. Step 4: Simplify right side
    2,811.24x = 4,054,484.26
  5. Step 5: Solve for x
    x = 4,054,484.26/2,811.24
  6. Step 6: Final answer
    x = 1,442.24

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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.