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Finding the Fourth Proportional to 308,861, 463,369.28 and 87,245

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Solution

The fourth proportional to 308,861, 463,369.28 and 87,245 is: 130,889.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,861 : 463,369.28 = 87,245 : x
  2. Step 2: Convert to fraction form
    308,861/463,369.28 = 87,245/x
  3. Step 3: Cross multiply
    308,861x = 463,369.28 × 87,245
  4. Step 4: Simplify right side
    308,861x = 40,426,652,833.60
  5. Step 5: Solve for x
    x = 40,426,652,833.60/308,861
  6. Step 6: Final answer
    x = 130,889.47

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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.