Home / 291,856-402,761.28-157,720

Finding the Fourth Proportional to 291,856, 402,761.28 and 157,720

Calculator

Solution

The fourth proportional to 291,856, 402,761.28 and 157,720 is: 217,653.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,856 : 402,761.28 = 157,720 : x
  2. Step 2: Convert to fraction form
    291,856/402,761.28 = 157,720/x
  3. Step 3: Cross multiply
    291,856x = 402,761.28 × 157,720
  4. Step 4: Simplify right side
    291,856x = 63,523,509,081.60
  5. Step 5: Solve for x
    x = 63,523,509,081.60/291,856
  6. Step 6: Final answer
    x = 217,653.60

Related Problems

Find fourth proportional to 145,928, 201,380.64 and 78,860
Half scale
Find fourth proportional to 583,712, 805,522.56 and 315,440
Double scale
Find fourth proportional to 291,857, 402,762.66 and 157,721
Similar ratio
Find fourth proportional to 437,784, 604,141.92 and 236,580
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.