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Finding the Fourth Proportional to 489,659,794.40, 734,489,691.60 and 425,886,874.40

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Solution

The fourth proportional to 489,659,794.40, 734,489,691.60 and 425,886,874.40 is: 638,830,311.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,659,794.40 : 734,489,691.60 = 425,886,874.40 : x
  2. Step 2: Convert to fraction form
    489,659,794.40/734,489,691.60 = 425,886,874.40/x
  3. Step 3: Cross multiply
    489,659,794.40x = 734,489,691.60 × 425,886,874.40
  4. Step 4: Simplify right side
    489,659,794.40x = 312,809,519,034,543,936
  5. Step 5: Solve for x
    x = 312,809,519,034,543,936/489,659,794.40
  6. Step 6: Final answer
    x = 638,830,311.60

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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.