Home / 927-1,390.50-243

Finding the Fourth Proportional to 927, 1,390.50 and 243

Calculator

Solution

The fourth proportional to 927, 1,390.50 and 243 is: 364.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    927 : 1,390.50 = 243 : x
  2. Step 2: Convert to fraction form
    927/1,390.50 = 243/x
  3. Step 3: Cross multiply
    927x = 1,390.50 × 243
  4. Step 4: Simplify right side
    927x = 337,891.50
  5. Step 5: Solve for x
    x = 337,891.50/927
  6. Step 6: Final answer
    x = 364.50

Related Problems

Find fourth proportional to 463.50, 695.25 and 121.50
Half scale
Find fourth proportional to 1,854, 2,781 and 486
Double scale
Find fourth proportional to 928, 1,392 and 244
Similar ratio
Find fourth proportional to 1,390.50, 2,085.75 and 364.50
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.