Home / 873-1,204.74-505

Finding the Fourth Proportional to 873, 1,204.74 and 505

Calculator

Solution

The fourth proportional to 873, 1,204.74 and 505 is: 696.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    873 : 1,204.74 = 505 : x
  2. Step 2: Convert to fraction form
    873/1,204.74 = 505/x
  3. Step 3: Cross multiply
    873x = 1,204.74 × 505
  4. Step 4: Simplify right side
    873x = 608,393.70
  5. Step 5: Solve for x
    x = 608,393.70/873
  6. Step 6: Final answer
    x = 696.90

Related Problems

Find fourth proportional to 436.50, 602.37 and 252.50
Half scale
Find fourth proportional to 1,746, 2,409.48 and 1,010
Double scale
Find fourth proportional to 874, 1,206.12 and 506
Similar ratio
Find fourth proportional to 1,309.50, 1,807.11 and 757.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.