Home / 123.38-291.75

Finding the Third Proportional to 123.38 and 291.75

Calculator

Solution

The third proportional to 123.38 and 291.75 is: 689.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.38 : 291.75 = 291.75 : x
  2. Step 2: Convert to fraction form
    123.38/291.75 = 291.75/x
  3. Step 3: Cross multiply
    123.38x = 291.75 × 291.75
  4. Step 4: Simplify right side
    123.38x = 85,118.06
  5. Step 5: Solve for x
    x = 85,118.06/123.38
  6. Step 6: Final answer
    x = 689.91

Related Problems

Find third proportional to 61.69 and 145.88
Half scale
Find third proportional to 246.75 and 583.50
Double scale
Find third proportional to 125 and 296
Similar ratio
Find third proportional to 185.06 and 437.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.