Home / 1,075.48-1,612.26-391

Finding the Fourth Proportional to 1,075.48, 1,612.26 and 391

Calculator

Solution

The fourth proportional to 1,075.48, 1,612.26 and 391 is: 586.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.48 : 1,612.26 = 391 : x
  2. Step 2: Convert to fraction form
    1,075.48/1,612.26 = 391/x
  3. Step 3: Cross multiply
    1,075.48x = 1,612.26 × 391
  4. Step 4: Simplify right side
    1,075.48x = 630,393.66
  5. Step 5: Solve for x
    x = 630,393.66/1,075.48
  6. Step 6: Final answer
    x = 586.15

Related Problems

Find fourth proportional to 537.74, 806.13 and 195.50
Half scale
Find fourth proportional to 2,150.96, 3,224.52 and 782
Double scale
Find fourth proportional to 1,076.48, 1,613.76 and 392
Similar ratio
Find fourth proportional to 1,613.22, 2,418.39 and 586.50
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.