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Finding the Fourth Proportional to 489,745.60, 734,618.40 and 331,115.20

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Solution

The fourth proportional to 489,745.60, 734,618.40 and 331,115.20 is: 496,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,745.60 : 734,618.40 = 331,115.20 : x
  2. Step 2: Convert to fraction form
    489,745.60/734,618.40 = 331,115.20/x
  3. Step 3: Cross multiply
    489,745.60x = 734,618.40 × 331,115.20
  4. Step 4: Simplify right side
    489,745.60x = 243,243,318,439.68
  5. Step 5: Solve for x
    x = 243,243,318,439.68/489,745.60
  6. Step 6: Final answer
    x = 496,672.80

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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.