Home / 693-1,039.86-351

Finding the Fourth Proportional to 693, 1,039.86 and 351

Calculator

Solution

The fourth proportional to 693, 1,039.86 and 351 is: 526.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    693 : 1,039.86 = 351 : x
  2. Step 2: Convert to fraction form
    693/1,039.86 = 351/x
  3. Step 3: Cross multiply
    693x = 1,039.86 × 351
  4. Step 4: Simplify right side
    693x = 364,990.86
  5. Step 5: Solve for x
    x = 364,990.86/693
  6. Step 6: Final answer
    x = 526.68

Related Problems

Find fourth proportional to 346.50, 519.93 and 175.50
Half scale
Find fourth proportional to 1,386, 2,079.72 and 702
Double scale
Find fourth proportional to 694, 1,041.36 and 352
Similar ratio
Find fourth proportional to 1,039.50, 1,559.79 and 526.50
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.