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Finding the Fourth Proportional to 395,220.87, 545,404.59 and 213,934.26

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Solution

The fourth proportional to 395,220.87, 545,404.59 and 213,934.26 is: 295,229.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,220.87 : 545,404.59 = 213,934.26 : x
  2. Step 2: Convert to fraction form
    395,220.87/545,404.59 = 213,934.26/x
  3. Step 3: Cross multiply
    395,220.87x = 545,404.59 × 213,934.26
  4. Step 4: Simplify right side
    395,220.87x = 116,680,729,407.52
  5. Step 5: Solve for x
    x = 116,680,729,407.52/395,220.87
  6. Step 6: Final answer
    x = 295,229.17

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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.