Home / 991,440-1,368,187.20-538,731

Finding the Fourth Proportional to 991,440, 1,368,187.20 and 538,731

Calculator

Solution

The fourth proportional to 991,440, 1,368,187.20 and 538,731 is: 743,448.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,440 : 1,368,187.20 = 538,731 : x
  2. Step 2: Convert to fraction form
    991,440/1,368,187.20 = 538,731/x
  3. Step 3: Cross multiply
    991,440x = 1,368,187.20 × 538,731
  4. Step 4: Simplify right side
    991,440x = 737,084,858,443.20
  5. Step 5: Solve for x
    x = 737,084,858,443.20/991,440
  6. Step 6: Final answer
    x = 743,448.78

Related Problems

Find fourth proportional to 495,720, 684,093.60 and 269,365.50
Half scale
Find fourth proportional to 1,982,880, 2,736,374.40 and 1,077,462
Double scale
Find fourth proportional to 991,441, 1,368,188.58 and 538,732
Similar ratio
Find fourth proportional to 1,487,160, 2,052,280.80 and 808,096.50
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.