Home / 286-430.73-253.90

Finding the Fourth Proportional to 286, 430.73 and 253.90

Calculator

Solution

The fourth proportional to 286, 430.73 and 253.90 is: 382.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    286 : 430.73 = 253.90 : x
  2. Step 2: Convert to fraction form
    286/430.73 = 253.90/x
  3. Step 3: Cross multiply
    286x = 430.73 × 253.90
  4. Step 4: Simplify right side
    286x = 109,362.35
  5. Step 5: Solve for x
    x = 109,362.35/286
  6. Step 6: Final answer
    x = 382.39

Related Problems

Find fourth proportional to 143, 215.37 and 126.95
Half scale
Find fourth proportional to 572, 861.46 and 507.80
Double scale
Find fourth proportional to 287, 432.24 and 254.90
Similar ratio
Find fourth proportional to 429, 646.10 and 380.85
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.