Home / 954.54-1,316.79-643.50

Finding the Fourth Proportional to 954.54, 1,316.79 and 643.50

Calculator

Solution

The fourth proportional to 954.54, 1,316.79 and 643.50 is: 887.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.54 : 1,316.79 = 643.50 : x
  2. Step 2: Convert to fraction form
    954.54/1,316.79 = 643.50/x
  3. Step 3: Cross multiply
    954.54x = 1,316.79 × 643.50
  4. Step 4: Simplify right side
    954.54x = 847,354.37
  5. Step 5: Solve for x
    x = 847,354.37/954.54
  6. Step 6: Final answer
    x = 887.71

Related Problems

Find fourth proportional to 477.27, 658.40 and 321.75
Half scale
Find fourth proportional to 1,909.08, 2,633.58 and 1,287
Double scale
Find fourth proportional to 955.54, 1,318.17 and 644.50
Similar ratio
Find fourth proportional to 1,431.81, 1,975.19 and 965.25
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.