Home / 1,307.56-1,805.70-1,229.80

Finding the Fourth Proportional to 1,307.56, 1,805.70 and 1,229.80

Calculator

Solution

The fourth proportional to 1,307.56, 1,805.70 and 1,229.80 is: 1,698.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.56 : 1,805.70 = 1,229.80 : x
  2. Step 2: Convert to fraction form
    1,307.56/1,805.70 = 1,229.80/x
  3. Step 3: Cross multiply
    1,307.56x = 1,805.70 × 1,229.80
  4. Step 4: Simplify right side
    1,307.56x = 2,220,649.86
  5. Step 5: Solve for x
    x = 2,220,649.86/1,307.56
  6. Step 6: Final answer
    x = 1,698.32

Related Problems

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.