Home / 438-657-245.64

Finding the Fourth Proportional to 438, 657 and 245.64

Calculator

Solution

The fourth proportional to 438, 657 and 245.64 is: 368.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    438 : 657 = 245.64 : x
  2. Step 2: Convert to fraction form
    438/657 = 245.64/x
  3. Step 3: Cross multiply
    438x = 657 × 245.64
  4. Step 4: Simplify right side
    438x = 161,385.48
  5. Step 5: Solve for x
    x = 161,385.48/438
  6. Step 6: Final answer
    x = 368.46

Related Problems

Find fourth proportional to 219, 328.50 and 122.82
Half scale
Find fourth proportional to 876, 1,314 and 491.28
Double scale
Find fourth proportional to 439, 658.50 and 246.64
Similar ratio
Find fourth proportional to 657, 985.50 and 368.46
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.