Home / 1,677.67-2,315.14-979

Finding the Fourth Proportional to 1,677.67, 2,315.14 and 979

Calculator

Solution

The fourth proportional to 1,677.67, 2,315.14 and 979 is: 1,350.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.67 : 2,315.14 = 979 : x
  2. Step 2: Convert to fraction form
    1,677.67/2,315.14 = 979/x
  3. Step 3: Cross multiply
    1,677.67x = 2,315.14 × 979
  4. Step 4: Simplify right side
    1,677.67x = 2,266,522.06
  5. Step 5: Solve for x
    x = 2,266,522.06/1,677.67
  6. Step 6: Final answer
    x = 1,350.99

Related Problems

Find fourth proportional to 838.84, 1,157.57 and 489.50
Half scale
Find fourth proportional to 3,355.34, 4,630.28 and 1,958
Double scale
Find fourth proportional to 1,678.67, 2,316.52 and 980
Similar ratio
Find fourth proportional to 2,516.51, 3,472.71 and 1,468.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.