Home / 278.46-417.69-198

Finding the Fourth Proportional to 278.46, 417.69 and 198

Calculator

Solution

The fourth proportional to 278.46, 417.69 and 198 is: 297

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.46 : 417.69 = 198 : x
  2. Step 2: Convert to fraction form
    278.46/417.69 = 198/x
  3. Step 3: Cross multiply
    278.46x = 417.69 × 198
  4. Step 4: Simplify right side
    278.46x = 82,702.62
  5. Step 5: Solve for x
    x = 82,702.62/278.46
  6. Step 6: Final answer
    x = 297

Related Problems

Find fourth proportional to 139.23, 208.85 and 99
Half scale
Find fourth proportional to 556.92, 835.38 and 396
Double scale
Find fourth proportional to 279.46, 419.19 and 199
Similar ratio
Find fourth proportional to 417.69, 626.54 and 297
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.