Home / 1,078-1,617-470

Finding the Fourth Proportional to 1,078, 1,617 and 470

Calculator

Solution

The fourth proportional to 1,078, 1,617 and 470 is: 705

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078 : 1,617 = 470 : x
  2. Step 2: Convert to fraction form
    1,078/1,617 = 470/x
  3. Step 3: Cross multiply
    1,078x = 1,617 × 470
  4. Step 4: Simplify right side
    1,078x = 759,990
  5. Step 5: Solve for x
    x = 759,990/1,078
  6. Step 6: Final answer
    x = 705

Related Problems

Find fourth proportional to 539, 808.50 and 235
Half scale
Find fourth proportional to 2,156, 3,234 and 940
Double scale
Find fourth proportional to 1,079, 1,618.50 and 471
Similar ratio
Find fourth proportional to 1,617, 2,425.50 and 705
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.