Home / 330.19-479.81

Finding the Third Proportional to 330.19 and 479.81

Calculator

Solution

The third proportional to 330.19 and 479.81 is: 697.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.19 : 479.81 = 479.81 : x
  2. Step 2: Convert to fraction form
    330.19/479.81 = 479.81/x
  3. Step 3: Cross multiply
    330.19x = 479.81 × 479.81
  4. Step 4: Simplify right side
    330.19x = 230,220.04
  5. Step 5: Solve for x
    x = 230,220.04/330.19
  6. Step 6: Final answer
    x = 697.24

Related Problems

Find third proportional to 165.09 and 239.91
Half scale
Find third proportional to 660.38 and 959.63
Double scale
Find third proportional to 332 and 483
Similar ratio
Find third proportional to 495.28 and 719.72
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.