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Finding the Fourth Proportional to 548,138.72, 821,604.36 and 358,520.96

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Solution

The fourth proportional to 548,138.72, 821,604.36 and 358,520.96 is: 537,386.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,138.72 : 821,604.36 = 358,520.96 : x
  2. Step 2: Convert to fraction form
    548,138.72/821,604.36 = 358,520.96/x
  3. Step 3: Cross multiply
    548,138.72x = 821,604.36 × 358,520.96
  4. Step 4: Simplify right side
    548,138.72x = 294,562,383,887.39
  5. Step 5: Solve for x
    x = 294,562,383,887.39/548,138.72
  6. Step 6: Final answer
    x = 537,386.57

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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.