Home / 1,520-2,280.32-608

Finding the Fourth Proportional to 1,520, 2,280.32 and 608

Calculator

Solution

The fourth proportional to 1,520, 2,280.32 and 608 is: 912.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520 : 2,280.32 = 608 : x
  2. Step 2: Convert to fraction form
    1,520/2,280.32 = 608/x
  3. Step 3: Cross multiply
    1,520x = 2,280.32 × 608
  4. Step 4: Simplify right side
    1,520x = 1,386,434.56
  5. Step 5: Solve for x
    x = 1,386,434.56/1,520
  6. Step 6: Final answer
    x = 912.13

Related Problems

Find fourth proportional to 760, 1,140.16 and 304
Half scale
Find fourth proportional to 3,040, 4,560.64 and 1,216
Double scale
Find fourth proportional to 1,521, 2,281.82 and 609
Similar ratio
Find fourth proportional to 2,280, 3,420.48 and 912
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.