Home / 718-1,077.18-205

Finding the Fourth Proportional to 718, 1,077.18 and 205

Calculator

Solution

The fourth proportional to 718, 1,077.18 and 205 is: 307.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    718 : 1,077.18 = 205 : x
  2. Step 2: Convert to fraction form
    718/1,077.18 = 205/x
  3. Step 3: Cross multiply
    718x = 1,077.18 × 205
  4. Step 4: Simplify right side
    718x = 220,821.90
  5. Step 5: Solve for x
    x = 220,821.90/718
  6. Step 6: Final answer
    x = 307.55

Related Problems

Find fourth proportional to 359, 538.59 and 102.50
Half scale
Find fourth proportional to 1,436, 2,154.36 and 410
Double scale
Find fourth proportional to 719, 1,078.68 and 206
Similar ratio
Find fourth proportional to 1,077, 1,615.77 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.