Home / 448.65-672.97-205

Finding the Fourth Proportional to 448.65, 672.97 and 205

Calculator

Solution

The fourth proportional to 448.65, 672.97 and 205 is: 307.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.65 : 672.97 = 205 : x
  2. Step 2: Convert to fraction form
    448.65/672.97 = 205/x
  3. Step 3: Cross multiply
    448.65x = 672.97 × 205
  4. Step 4: Simplify right side
    448.65x = 137,958.85
  5. Step 5: Solve for x
    x = 137,958.85/448.65
  6. Step 6: Final answer
    x = 307.50

Related Problems

Find fourth proportional to 224.33, 336.49 and 102.50
Half scale
Find fourth proportional to 897.30, 1,345.94 and 410
Double scale
Find fourth proportional to 449.65, 674.47 and 206
Similar ratio
Find fourth proportional to 672.98, 1,009.46 and 307.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.