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Finding the Fourth Proportional to 647,108.40, 970,662.60 and 489,644.40

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Solution

The fourth proportional to 647,108.40, 970,662.60 and 489,644.40 is: 734,466.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,108.40 : 970,662.60 = 489,644.40 : x
  2. Step 2: Convert to fraction form
    647,108.40/970,662.60 = 489,644.40/x
  3. Step 3: Cross multiply
    647,108.40x = 970,662.60 × 489,644.40
  4. Step 4: Simplify right side
    647,108.40x = 475,279,506,379.44
  5. Step 5: Solve for x
    x = 475,279,506,379.44/647,108.40
  6. Step 6: Final answer
    x = 734,466.60

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Similar ratio
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1.5x scale

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.