Home / 949-1,309.80-535

Finding the Fourth Proportional to 949, 1,309.80 and 535

Calculator

Solution

The fourth proportional to 949, 1,309.80 and 535 is: 738.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    949 : 1,309.80 = 535 : x
  2. Step 2: Convert to fraction form
    949/1,309.80 = 535/x
  3. Step 3: Cross multiply
    949x = 1,309.80 × 535
  4. Step 4: Simplify right side
    949x = 700,743
  5. Step 5: Solve for x
    x = 700,743/949
  6. Step 6: Final answer
    x = 738.40

Related Problems

Find fourth proportional to 474.50, 654.90 and 267.50
Half scale
Find fourth proportional to 1,898, 2,619.60 and 1,070
Double scale
Find fourth proportional to 950, 1,311.18 and 536
Similar ratio
Find fourth proportional to 1,423.50, 1,964.70 and 802.50
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.