Home / 488.53-691.98

Finding the Third Proportional to 488.53 and 691.98

Calculator

Solution

The third proportional to 488.53 and 691.98 is: 980.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.53 : 691.98 = 691.98 : x
  2. Step 2: Convert to fraction form
    488.53/691.98 = 691.98/x
  3. Step 3: Cross multiply
    488.53x = 691.98 × 691.98
  4. Step 4: Simplify right side
    488.53x = 478,836.97
  5. Step 5: Solve for x
    x = 478,836.97/488.53
  6. Step 6: Final answer
    x = 980.16

Related Problems

Find third proportional to 244.27 and 345.99
Half scale
Find third proportional to 977.06 and 1,383.96
Double scale
Find third proportional to 491 and 695
Similar ratio
Find third proportional to 732.80 and 1,037.97
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.