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Finding the Fourth Proportional to 339,503.30, 509,333.70 and 99,607.50

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Solution

The fourth proportional to 339,503.30, 509,333.70 and 99,607.50 is: 149,434.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,503.30 : 509,333.70 = 99,607.50 : x
  2. Step 2: Convert to fraction form
    339,503.30/509,333.70 = 99,607.50/x
  3. Step 3: Cross multiply
    339,503.30x = 509,333.70 × 99,607.50
  4. Step 4: Simplify right side
    339,503.30x = 50,733,456,522.75
  5. Step 5: Solve for x
    x = 50,733,456,522.75/339,503.30
  6. Step 6: Final answer
    x = 149,434.36

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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.