Home / 286-429.06-115

Finding the Fourth Proportional to 286, 429.06 and 115

Calculator

Solution

The fourth proportional to 286, 429.06 and 115 is: 172.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    286 : 429.06 = 115 : x
  2. Step 2: Convert to fraction form
    286/429.06 = 115/x
  3. Step 3: Cross multiply
    286x = 429.06 × 115
  4. Step 4: Simplify right side
    286x = 49,341.90
  5. Step 5: Solve for x
    x = 49,341.90/286
  6. Step 6: Final answer
    x = 172.52

Related Problems

Find fourth proportional to 143, 214.53 and 57.50
Half scale
Find fourth proportional to 572, 858.12 and 230
Double scale
Find fourth proportional to 287, 430.56 and 116
Similar ratio
Find fourth proportional to 429, 643.59 and 172.50
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.