Home / 609-913.50-153

Finding the Fourth Proportional to 609, 913.50 and 153

Calculator

Solution

The fourth proportional to 609, 913.50 and 153 is: 229.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    609 : 913.50 = 153 : x
  2. Step 2: Convert to fraction form
    609/913.50 = 153/x
  3. Step 3: Cross multiply
    609x = 913.50 × 153
  4. Step 4: Simplify right side
    609x = 139,765.50
  5. Step 5: Solve for x
    x = 139,765.50/609
  6. Step 6: Final answer
    x = 229.50

Related Problems

Find fourth proportional to 304.50, 456.75 and 76.50
Half scale
Find fourth proportional to 1,218, 1,827 and 306
Double scale
Find fourth proportional to 610, 915 and 154
Similar ratio
Find fourth proportional to 913.50, 1,370.25 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.