Home / 1,239.48-1,710-866.88

Finding the Fourth Proportional to 1,239.48, 1,710 and 866.88

Calculator

Solution

The fourth proportional to 1,239.48, 1,710 and 866.88 is: 1,195.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.48 : 1,710 = 866.88 : x
  2. Step 2: Convert to fraction form
    1,239.48/1,710 = 866.88/x
  3. Step 3: Cross multiply
    1,239.48x = 1,710 × 866.88
  4. Step 4: Simplify right side
    1,239.48x = 1,482,364.80
  5. Step 5: Solve for x
    x = 1,482,364.80/1,239.48
  6. Step 6: Final answer
    x = 1,195.96

Related Problems

Find fourth proportional to 619.74, 855 and 433.44
Half scale
Find fourth proportional to 2,478.96, 3,420 and 1,733.76
Double scale
Find fourth proportional to 1,240.48, 1,711.38 and 867.88
Similar ratio
Find fourth proportional to 1,859.22, 2,565 and 1,300.32
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.