Home / 290,469.60-405,828-290,469.60

Finding the Fourth Proportional to 290,469.60, 405,828 and 290,469.60

Calculator

Solution

The fourth proportional to 290,469.60, 405,828 and 290,469.60 is: 405,828

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,469.60 : 405,828 = 290,469.60 : x
  2. Step 2: Convert to fraction form
    290,469.60/405,828 = 290,469.60/x
  3. Step 3: Cross multiply
    290,469.60x = 405,828 × 290,469.60
  4. Step 4: Simplify right side
    290,469.60x = 117,880,696,828.80
  5. Step 5: Solve for x
    x = 117,880,696,828.80/290,469.60
  6. Step 6: Final answer
    x = 405,828

Related Problems

Find fourth proportional to 145,234.80, 202,914 and 145,234.80
Half scale
Find fourth proportional to 580,939.20, 811,656 and 580,939.20
Double scale
Find fourth proportional to 290,470.60, 405,829.40 and 290,470.60
Similar ratio
Find fourth proportional to 435,704.40, 608,742 and 435,704.40
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.