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Finding the Fourth Proportional to 328,179.77, 492,269.60 and 78,861.77

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Solution

The fourth proportional to 328,179.77, 492,269.60 and 78,861.77 is: 118,292.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,179.77 : 492,269.60 = 78,861.77 : x
  2. Step 2: Convert to fraction form
    328,179.77/492,269.60 = 78,861.77/x
  3. Step 3: Cross multiply
    328,179.77x = 492,269.60 × 78,861.77
  4. Step 4: Simplify right side
    328,179.77x = 38,821,251,555.01
  5. Step 5: Solve for x
    x = 38,821,251,555.01/328,179.77
  6. Step 6: Final answer
    x = 118,292.64

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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.