Home / 560.34-771.66-558.72

Finding the Fourth Proportional to 560.34, 771.66 and 558.72

Calculator

Solution

The fourth proportional to 560.34, 771.66 and 558.72 is: 769.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.34 : 771.66 = 558.72 : x
  2. Step 2: Convert to fraction form
    560.34/771.66 = 558.72/x
  3. Step 3: Cross multiply
    560.34x = 771.66 × 558.72
  4. Step 4: Simplify right side
    560.34x = 431,141.88
  5. Step 5: Solve for x
    x = 431,141.88/560.34
  6. Step 6: Final answer
    x = 769.43

Related Problems

Find fourth proportional to 280.17, 385.83 and 279.36
Half scale
Find fourth proportional to 1,120.68, 1,543.32 and 1,117.44
Double scale
Find fourth proportional to 561.34, 773.04 and 559.72
Similar ratio
Find fourth proportional to 840.51, 1,157.49 and 838.08
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.