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Finding the Fourth Proportional to 328,482.70, 492,738.63 and 128,785.30

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Solution

The fourth proportional to 328,482.70, 492,738.63 and 128,785.30 is: 193,183.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,482.70 : 492,738.63 = 128,785.30 : x
  2. Step 2: Convert to fraction form
    328,482.70/492,738.63 = 128,785.30/x
  3. Step 3: Cross multiply
    328,482.70x = 492,738.63 × 128,785.30
  4. Step 4: Simplify right side
    328,482.70x = 63,457,492,286.14
  5. Step 5: Solve for x
    x = 63,457,492,286.14/328,482.70
  6. Step 6: Final answer
    x = 193,183.67

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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.