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Finding the Fourth Proportional to 328,183.80, 492,250.10 and 128,465.40

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Solution

The fourth proportional to 328,183.80, 492,250.10 and 128,465.40 is: 192,688.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,183.80 : 492,250.10 = 128,465.40 : x
  2. Step 2: Convert to fraction form
    328,183.80/492,250.10 = 128,465.40/x
  3. Step 3: Cross multiply
    328,183.80x = 492,250.10 × 128,465.40
  4. Step 4: Simplify right side
    328,183.80x = 63,237,105,996.54
  5. Step 5: Solve for x
    x = 63,237,105,996.54/328,183.80
  6. Step 6: Final answer
    x = 192,688.08

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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.