Home / 389.25-432

Finding the Third Proportional to 389.25 and 432

Calculator

Solution

The third proportional to 389.25 and 432 is: 479.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.25 : 432 = 432 : x
  2. Step 2: Convert to fraction form
    389.25/432 = 432/x
  3. Step 3: Cross multiply
    389.25x = 432 × 432
  4. Step 4: Simplify right side
    389.25x = 186,624
  5. Step 5: Solve for x
    x = 186,624/389.25
  6. Step 6: Final answer
    x = 479.45

Related Problems

Find third proportional to 194.63 and 216
Half scale
Find third proportional to 778.50 and 864
Double scale
Find third proportional to 391 and 434
Similar ratio
Find third proportional to 583.88 and 648
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.