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Finding the Fourth Proportional to 489,750.60, 734,625.90 and 331,120.20

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Solution

The fourth proportional to 489,750.60, 734,625.90 and 331,120.20 is: 496,680.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,750.60 : 734,625.90 = 331,120.20 : x
  2. Step 2: Convert to fraction form
    489,750.60/734,625.90 = 331,120.20/x
  3. Step 3: Cross multiply
    489,750.60x = 734,625.90 × 331,120.20
  4. Step 4: Simplify right side
    489,750.60x = 243,249,474,933.18
  5. Step 5: Solve for x
    x = 243,249,474,933.18/489,750.60
  6. Step 6: Final answer
    x = 496,680.30

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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.