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Finding the Fourth Proportional to 658,876.80, 989,481.60 and 509,480.40

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Solution

The fourth proportional to 658,876.80, 989,481.60 and 509,480.40 is: 765,122.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,876.80 : 989,481.60 = 509,480.40 : x
  2. Step 2: Convert to fraction form
    658,876.80/989,481.60 = 509,480.40/x
  3. Step 3: Cross multiply
    658,876.80x = 989,481.60 × 509,480.40
  4. Step 4: Simplify right side
    658,876.80x = 504,121,481,360.64
  5. Step 5: Solve for x
    x = 504,121,481,360.64/658,876.80
  6. Step 6: Final answer
    x = 765,122.53

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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.