Home / 1,209-1,813.50-297

Finding the Fourth Proportional to 1,209, 1,813.50 and 297

Calculator

Solution

The fourth proportional to 1,209, 1,813.50 and 297 is: 445.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209 : 1,813.50 = 297 : x
  2. Step 2: Convert to fraction form
    1,209/1,813.50 = 297/x
  3. Step 3: Cross multiply
    1,209x = 1,813.50 × 297
  4. Step 4: Simplify right side
    1,209x = 538,609.50
  5. Step 5: Solve for x
    x = 538,609.50/1,209
  6. Step 6: Final answer
    x = 445.50

Related Problems

Find fourth proportional to 604.50, 906.75 and 148.50
Half scale
Find fourth proportional to 2,418, 3,627 and 594
Double scale
Find fourth proportional to 1,210, 1,815 and 298
Similar ratio
Find fourth proportional to 1,813.50, 2,720.25 and 445.50
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.