Home / 462.30-693.45-431.70

Finding the Fourth Proportional to 462.30, 693.45 and 431.70

Calculator

Solution

The fourth proportional to 462.30, 693.45 and 431.70 is: 647.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.30 : 693.45 = 431.70 : x
  2. Step 2: Convert to fraction form
    462.30/693.45 = 431.70/x
  3. Step 3: Cross multiply
    462.30x = 693.45 × 431.70
  4. Step 4: Simplify right side
    462.30x = 299,362.37
  5. Step 5: Solve for x
    x = 299,362.37/462.30
  6. Step 6: Final answer
    x = 647.55

Related Problems

Find fourth proportional to 231.15, 346.73 and 215.85
Half scale
Find fourth proportional to 924.60, 1,386.90 and 863.40
Double scale
Find fourth proportional to 463.30, 694.95 and 432.70
Similar ratio
Find fourth proportional to 693.45, 1,040.18 and 647.55
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.