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Finding the Fourth Proportional to 387,571.92, 534,845.88 and 217,805.64

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Solution

The fourth proportional to 387,571.92, 534,845.88 and 217,805.64 is: 300,569.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,571.92 : 534,845.88 = 217,805.64 : x
  2. Step 2: Convert to fraction form
    387,571.92/534,845.88 = 217,805.64/x
  3. Step 3: Cross multiply
    387,571.92x = 534,845.88 × 217,805.64
  4. Step 4: Simplify right side
    387,571.92x = 116,492,449,194.76
  5. Step 5: Solve for x
    x = 116,492,449,194.76/387,571.92
  6. Step 6: Final answer
    x = 300,569.89

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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.