Home / 667,928-921,743.88-399,656

Finding the Fourth Proportional to 667,928, 921,743.88 and 399,656

Calculator

Solution

The fourth proportional to 667,928, 921,743.88 and 399,656 is: 551,527.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,928 : 921,743.88 = 399,656 : x
  2. Step 2: Convert to fraction form
    667,928/921,743.88 = 399,656/x
  3. Step 3: Cross multiply
    667,928x = 921,743.88 × 399,656
  4. Step 4: Simplify right side
    667,928x = 368,380,472,105.28
  5. Step 5: Solve for x
    x = 368,380,472,105.28/667,928
  6. Step 6: Final answer
    x = 551,527.22

Related Problems

Find fourth proportional to 333,964, 460,871.94 and 199,828
Half scale
Find fourth proportional to 1,335,856, 1,843,487.76 and 799,312
Double scale
Find fourth proportional to 667,929, 921,745.26 and 399,657
Similar ratio
Find fourth proportional to 1,001,892, 1,382,615.82 and 599,484
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.