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Finding the Fourth Proportional to 386,728.62, 533,783.60 and 264,270.59

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Solution

The fourth proportional to 386,728.62, 533,783.60 and 264,270.59 is: 364,760.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,728.62 : 533,783.60 = 264,270.59 : x
  2. Step 2: Convert to fraction form
    386,728.62/533,783.60 = 264,270.59/x
  3. Step 3: Cross multiply
    386,728.62x = 533,783.60 × 264,270.59
  4. Step 4: Simplify right side
    386,728.62x = 141,063,306,917.43
  5. Step 5: Solve for x
    x = 141,063,306,917.43/386,728.62
  6. Step 6: Final answer
    x = 364,760.45

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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.