Home / 2,261.48-3,119.74-1,421.76

Finding the Fourth Proportional to 2,261.48, 3,119.74 and 1,421.76

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Solution

The fourth proportional to 2,261.48, 3,119.74 and 1,421.76 is: 1,961.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.48 : 3,119.74 = 1,421.76 : x
  2. Step 2: Convert to fraction form
    2,261.48/3,119.74 = 1,421.76/x
  3. Step 3: Cross multiply
    2,261.48x = 3,119.74 × 1,421.76
  4. Step 4: Simplify right side
    2,261.48x = 4,435,521.54
  5. Step 5: Solve for x
    x = 4,435,521.54/2,261.48
  6. Step 6: Final answer
    x = 1,961.34

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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.