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Finding the Fourth Proportional to 315,682.21, 435,625.19 and 172,414.58

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Solution

The fourth proportional to 315,682.21, 435,625.19 and 172,414.58 is: 237,923.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,682.21 : 435,625.19 = 172,414.58 : x
  2. Step 2: Convert to fraction form
    315,682.21/435,625.19 = 172,414.58/x
  3. Step 3: Cross multiply
    315,682.21x = 435,625.19 × 172,414.58
  4. Step 4: Simplify right side
    315,682.21x = 75,108,131,777.63
  5. Step 5: Solve for x
    x = 75,108,131,777.63/315,682.21
  6. Step 6: Final answer
    x = 237,923.23

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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.