Home / 623.99-861.10-375.31

Finding the Fourth Proportional to 623.99, 861.10 and 375.31

Calculator

Solution

The fourth proportional to 623.99, 861.10 and 375.31 is: 517.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.99 : 861.10 = 375.31 : x
  2. Step 2: Convert to fraction form
    623.99/861.10 = 375.31/x
  3. Step 3: Cross multiply
    623.99x = 861.10 × 375.31
  4. Step 4: Simplify right side
    623.99x = 323,179.58
  5. Step 5: Solve for x
    x = 323,179.58/623.99
  6. Step 6: Final answer
    x = 517.92

Related Problems

Find fourth proportional to 312.00, 430.55 and 187.66
Half scale
Find fourth proportional to 1,247.99, 1,722.20 and 750.62
Double scale
Find fourth proportional to 624.99, 862.48 and 376.31
Similar ratio
Find fourth proportional to 935.99, 1,291.65 and 562.97
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.