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Finding the Fourth Proportional to 328,183.60, 492,275.40 and 78,865.60

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Solution

The fourth proportional to 328,183.60, 492,275.40 and 78,865.60 is: 118,298.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,183.60 : 492,275.40 = 78,865.60 : x
  2. Step 2: Convert to fraction form
    328,183.60/492,275.40 = 78,865.60/x
  3. Step 3: Cross multiply
    328,183.60x = 492,275.40 × 78,865.60
  4. Step 4: Simplify right side
    328,183.60x = 38,823,594,786.24
  5. Step 5: Solve for x
    x = 38,823,594,786.24/328,183.60
  6. Step 6: Final answer
    x = 118,298.40

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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.