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Finding the Fourth Proportional to 208,604.35, 312,906.53 and 103,628.35

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Solution

The fourth proportional to 208,604.35, 312,906.53 and 103,628.35 is: 155,442.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,604.35 : 312,906.53 = 103,628.35 : x
  2. Step 2: Convert to fraction form
    208,604.35/312,906.53 = 103,628.35/x
  3. Step 3: Cross multiply
    208,604.35x = 312,906.53 × 103,628.35
  4. Step 4: Simplify right side
    208,604.35x = 32,425,987,408.13
  5. Step 5: Solve for x
    x = 32,425,987,408.13/208,604.35
  6. Step 6: Final answer
    x = 155,442.53

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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.