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Finding the Fourth Proportional to 658,443.57, 987,562.32 and 209,105.28

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Solution

The fourth proportional to 658,443.57, 987,562.32 and 209,105.28 is: 313,625.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,443.57 : 987,562.32 = 209,105.28 : x
  2. Step 2: Convert to fraction form
    658,443.57/987,562.32 = 209,105.28/x
  3. Step 3: Cross multiply
    658,443.57x = 987,562.32 × 209,105.28
  4. Step 4: Simplify right side
    658,443.57x = 206,504,495,441.05
  5. Step 5: Solve for x
    x = 206,504,495,441.05/658,443.57
  6. Step 6: Final answer
    x = 313,625.20

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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.