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Finding the Fourth Proportional to 395,203.95, 545,380.83 and 213,915.69

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Solution

The fourth proportional to 395,203.95, 545,380.83 and 213,915.69 is: 295,203.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,203.95 : 545,380.83 = 213,915.69 : x
  2. Step 2: Convert to fraction form
    395,203.95/545,380.83 = 213,915.69/x
  3. Step 3: Cross multiply
    395,203.95x = 545,380.83 × 213,915.69
  4. Step 4: Simplify right side
    395,203.95x = 116,665,516,562.22
  5. Step 5: Solve for x
    x = 116,665,516,562.22/395,203.95
  6. Step 6: Final answer
    x = 295,203.32

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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.