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Finding the Fourth Proportional to 309,028.40, 463,715.40 and 131,505.20

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Solution

The fourth proportional to 309,028.40, 463,715.40 and 131,505.20 is: 197,331.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,028.40 : 463,715.40 = 131,505.20 : x
  2. Step 2: Convert to fraction form
    309,028.40/463,715.40 = 131,505.20/x
  3. Step 3: Cross multiply
    309,028.40x = 463,715.40 × 131,505.20
  4. Step 4: Simplify right side
    309,028.40x = 60,980,986,420.08
  5. Step 5: Solve for x
    x = 60,980,986,420.08/309,028.40
  6. Step 6: Final answer
    x = 197,331.33

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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.