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Finding the Fourth Proportional to 489,158.54, 675,135.60 and 317,289.50

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Solution

The fourth proportional to 489,158.54, 675,135.60 and 317,289.50 is: 437,922.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,158.54 : 675,135.60 = 317,289.50 : x
  2. Step 2: Convert to fraction form
    489,158.54/675,135.60 = 317,289.50/x
  3. Step 3: Cross multiply
    489,158.54x = 675,135.60 × 317,289.50
  4. Step 4: Simplify right side
    489,158.54x = 214,213,437,850.82
  5. Step 5: Solve for x
    x = 214,213,437,850.82/489,158.54
  6. Step 6: Final answer
    x = 437,922.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.