Home / 807.20-1,114.20-458

Finding the Fourth Proportional to 807.20, 1,114.20 and 458

Calculator

Solution

The fourth proportional to 807.20, 1,114.20 and 458 is: 632.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.20 : 1,114.20 = 458 : x
  2. Step 2: Convert to fraction form
    807.20/1,114.20 = 458/x
  3. Step 3: Cross multiply
    807.20x = 1,114.20 × 458
  4. Step 4: Simplify right side
    807.20x = 510,303.60
  5. Step 5: Solve for x
    x = 510,303.60/807.20
  6. Step 6: Final answer
    x = 632.19

Related Problems

Find fourth proportional to 403.60, 557.10 and 229
Half scale
Find fourth proportional to 1,614.40, 2,228.40 and 916
Double scale
Find fourth proportional to 808.20, 1,115.58 and 459
Similar ratio
Find fourth proportional to 1,210.80, 1,671.30 and 687
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.