Home / 457-685.50-153

Finding the Fourth Proportional to 457, 685.50 and 153

Calculator

Solution

The fourth proportional to 457, 685.50 and 153 is: 229.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    457 : 685.50 = 153 : x
  2. Step 2: Convert to fraction form
    457/685.50 = 153/x
  3. Step 3: Cross multiply
    457x = 685.50 × 153
  4. Step 4: Simplify right side
    457x = 104,881.50
  5. Step 5: Solve for x
    x = 104,881.50/457
  6. Step 6: Final answer
    x = 229.50

Related Problems

Find fourth proportional to 228.50, 342.75 and 76.50
Half scale
Find fourth proportional to 914, 1,371 and 306
Double scale
Find fourth proportional to 458, 687 and 154
Similar ratio
Find fourth proportional to 685.50, 1,028.25 and 229.50
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.