Home / 188-282-72.45

Finding the Fourth Proportional to 188, 282 and 72.45

Calculator

Solution

The fourth proportional to 188, 282 and 72.45 is: 108.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    188 : 282 = 72.45 : x
  2. Step 2: Convert to fraction form
    188/282 = 72.45/x
  3. Step 3: Cross multiply
    188x = 282 × 72.45
  4. Step 4: Simplify right side
    188x = 20,430.90
  5. Step 5: Solve for x
    x = 20,430.90/188
  6. Step 6: Final answer
    x = 108.68

Related Problems

Find fourth proportional to 94, 141 and 36.23
Half scale
Find fourth proportional to 376, 564 and 144.90
Double scale
Find fourth proportional to 189, 283.50 and 73.45
Similar ratio
Find fourth proportional to 282, 423 and 108.68
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.