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Finding the Fourth Proportional to 339,469.16, 509,299.07 and 99,588.72

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Solution

The fourth proportional to 339,469.16, 509,299.07 and 99,588.72 is: 149,411.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,469.16 : 509,299.07 = 99,588.72 : x
  2. Step 2: Convert to fraction form
    339,469.16/509,299.07 = 99,588.72/x
  3. Step 3: Cross multiply
    339,469.16x = 509,299.07 × 99,588.72
  4. Step 4: Simplify right side
    339,469.16x = 50,720,442,478.49
  5. Step 5: Solve for x
    x = 50,720,442,478.49/339,469.16
  6. Step 6: Final answer
    x = 149,411.05

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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.