Home / 392.00-540.78-267.45

Finding the Fourth Proportional to 392.00, 540.78 and 267.45

Calculator

Solution

The fourth proportional to 392.00, 540.78 and 267.45 is: 368.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.00 : 540.78 = 267.45 : x
  2. Step 2: Convert to fraction form
    392.00/540.78 = 267.45/x
  3. Step 3: Cross multiply
    392.00x = 540.78 × 267.45
  4. Step 4: Simplify right side
    392.00x = 144,631.61
  5. Step 5: Solve for x
    x = 144,631.61/392.00
  6. Step 6: Final answer
    x = 368.96

Related Problems

Find fourth proportional to 196.00, 270.39 and 133.73
Half scale
Find fourth proportional to 783.99, 1,081.56 and 534.90
Double scale
Find fourth proportional to 393, 542.16 and 268.45
Similar ratio
Find fourth proportional to 587.99, 811.17 and 401.18
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.