Home / 357-490.41-313.26

Finding the Fourth Proportional to 357, 490.41 and 313.26

Calculator

Solution

The fourth proportional to 357, 490.41 and 313.26 is: 430.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    357 : 490.41 = 313.26 : x
  2. Step 2: Convert to fraction form
    357/490.41 = 313.26/x
  3. Step 3: Cross multiply
    357x = 490.41 × 313.26
  4. Step 4: Simplify right side
    357x = 153,625.84
  5. Step 5: Solve for x
    x = 153,625.84/357
  6. Step 6: Final answer
    x = 430.32

Related Problems

Find fourth proportional to 178.50, 245.21 and 156.63
Half scale
Find fourth proportional to 714, 980.82 and 626.52
Double scale
Find fourth proportional to 358, 491.78 and 314.26
Similar ratio
Find fourth proportional to 535.50, 735.62 and 469.89
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.