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Finding the Fourth Proportional to 258,416.64, 387,628.80 and 170,234.88

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Solution

The fourth proportional to 258,416.64, 387,628.80 and 170,234.88 is: 255,354.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,416.64 : 387,628.80 = 170,234.88 : x
  2. Step 2: Convert to fraction form
    258,416.64/387,628.80 = 170,234.88/x
  3. Step 3: Cross multiply
    258,416.64x = 387,628.80 × 170,234.88
  4. Step 4: Simplify right side
    258,416.64x = 65,987,942,252.54
  5. Step 5: Solve for x
    x = 65,987,942,252.54/258,416.64
  6. Step 6: Final answer
    x = 255,354.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.