Home / 544.38-815.76-429.11

Finding the Fourth Proportional to 544.38, 815.76 and 429.11

Calculator

Solution

The fourth proportional to 544.38, 815.76 and 429.11 is: 643.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.38 : 815.76 = 429.11 : x
  2. Step 2: Convert to fraction form
    544.38/815.76 = 429.11/x
  3. Step 3: Cross multiply
    544.38x = 815.76 × 429.11
  4. Step 4: Simplify right side
    544.38x = 350,046.69
  5. Step 5: Solve for x
    x = 350,046.69/544.38
  6. Step 6: Final answer
    x = 643.02

Related Problems

Find fourth proportional to 272.19, 407.88 and 214.55
Half scale
Find fourth proportional to 1,088.76, 1,631.52 and 858.21
Double scale
Find fourth proportional to 545.38, 817.26 and 430.11
Similar ratio
Find fourth proportional to 816.57, 1,223.64 and 643.66
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.