Home / 690.72-953.35-470.20

Finding the Fourth Proportional to 690.72, 953.35 and 470.20

Calculator

Solution

The fourth proportional to 690.72, 953.35 and 470.20 is: 648.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.72 : 953.35 = 470.20 : x
  2. Step 2: Convert to fraction form
    690.72/953.35 = 470.20/x
  3. Step 3: Cross multiply
    690.72x = 953.35 × 470.20
  4. Step 4: Simplify right side
    690.72x = 448,265.17
  5. Step 5: Solve for x
    x = 448,265.17/690.72
  6. Step 6: Final answer
    x = 648.98

Related Problems

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.