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Finding the Fourth Proportional to 339,715.40, 509,508.30 and 103,065.80

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Solution

The fourth proportional to 339,715.40, 509,508.30 and 103,065.80 is: 154,579.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,715.40 : 509,508.30 = 103,065.80 : x
  2. Step 2: Convert to fraction form
    339,715.40/509,508.30 = 103,065.80/x
  3. Step 3: Cross multiply
    339,715.40x = 509,508.30 × 103,065.80
  4. Step 4: Simplify right side
    339,715.40x = 52,512,880,546.14
  5. Step 5: Solve for x
    x = 52,512,880,546.14/339,715.40
  6. Step 6: Final answer
    x = 154,579.04

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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.