Home / 314.78-434.58-245

Finding the Fourth Proportional to 314.78, 434.58 and 245

Calculator

Solution

The fourth proportional to 314.78, 434.58 and 245 is: 338.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.78 : 434.58 = 245 : x
  2. Step 2: Convert to fraction form
    314.78/434.58 = 245/x
  3. Step 3: Cross multiply
    314.78x = 434.58 × 245
  4. Step 4: Simplify right side
    314.78x = 106,472.10
  5. Step 5: Solve for x
    x = 106,472.10/314.78
  6. Step 6: Final answer
    x = 338.24

Related Problems

Find fourth proportional to 157.39, 217.29 and 122.50
Half scale
Find fourth proportional to 629.56, 869.16 and 490
Double scale
Find fourth proportional to 315.78, 435.96 and 246
Similar ratio
Find fourth proportional to 472.17, 651.87 and 367.50
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.