Home / 568.40-784.31-347.45

Finding the Fourth Proportional to 568.40, 784.31 and 347.45

Calculator

Solution

The fourth proportional to 568.40, 784.31 and 347.45 is: 479.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.40 : 784.31 = 347.45 : x
  2. Step 2: Convert to fraction form
    568.40/784.31 = 347.45/x
  3. Step 3: Cross multiply
    568.40x = 784.31 × 347.45
  4. Step 4: Simplify right side
    568.40x = 272,502.85
  5. Step 5: Solve for x
    x = 272,502.85/568.40
  6. Step 6: Final answer
    x = 479.43

Related Problems

Find fourth proportional to 284.20, 392.15 and 173.72
Half scale
Find fourth proportional to 1,136.79, 1,568.61 and 694.89
Double scale
Find fourth proportional to 569.40, 785.68 and 348.45
Similar ratio
Find fourth proportional to 852.59, 1,176.46 and 521.17
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.