Home / 761.07-1,140.90-274

Finding the Fourth Proportional to 761.07, 1,140.90 and 274

Calculator

Solution

The fourth proportional to 761.07, 1,140.90 and 274 is: 410.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.07 : 1,140.90 = 274 : x
  2. Step 2: Convert to fraction form
    761.07/1,140.90 = 274/x
  3. Step 3: Cross multiply
    761.07x = 1,140.90 × 274
  4. Step 4: Simplify right side
    761.07x = 312,606.60
  5. Step 5: Solve for x
    x = 312,606.60/761.07
  6. Step 6: Final answer
    x = 410.75

Related Problems

Find fourth proportional to 380.54, 570.45 and 137
Half scale
Find fourth proportional to 1,522.14, 2,281.80 and 548
Double scale
Find fourth proportional to 762.07, 1,142.40 and 275
Similar ratio
Find fourth proportional to 1,141.61, 1,711.35 and 411
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.