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Finding the Fourth Proportional to 320,387.20, 480,653.80 and 170,548.54

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Solution

The fourth proportional to 320,387.20, 480,653.80 and 170,548.54 is: 255,861.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,387.20 : 480,653.80 = 170,548.54 : x
  2. Step 2: Convert to fraction form
    320,387.20/480,653.80 = 170,548.54/x
  3. Step 3: Cross multiply
    320,387.20x = 480,653.80 × 170,548.54
  4. Step 4: Simplify right side
    320,387.20x = 81,974,802,207.45
  5. Step 5: Solve for x
    x = 81,974,802,207.45/320,387.20
  6. Step 6: Final answer
    x = 255,861.67

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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.