Home / 714-1,071-281.28

Finding the Fourth Proportional to 714, 1,071 and 281.28

Calculator

Solution

The fourth proportional to 714, 1,071 and 281.28 is: 421.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    714 : 1,071 = 281.28 : x
  2. Step 2: Convert to fraction form
    714/1,071 = 281.28/x
  3. Step 3: Cross multiply
    714x = 1,071 × 281.28
  4. Step 4: Simplify right side
    714x = 301,250.88
  5. Step 5: Solve for x
    x = 301,250.88/714
  6. Step 6: Final answer
    x = 421.92

Related Problems

Find fourth proportional to 357, 535.50 and 140.64
Half scale
Find fourth proportional to 1,428, 2,142 and 562.56
Double scale
Find fourth proportional to 715, 1,072.50 and 282.28
Similar ratio
Find fourth proportional to 1,071, 1,606.50 and 421.92
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.