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Finding the Fourth Proportional to 662,408.20, 993,612.30 and 396,987.40

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Solution

The fourth proportional to 662,408.20, 993,612.30 and 396,987.40 is: 595,481.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,408.20 : 993,612.30 = 396,987.40 : x
  2. Step 2: Convert to fraction form
    662,408.20/993,612.30 = 396,987.40/x
  3. Step 3: Cross multiply
    662,408.20x = 993,612.30 × 396,987.40
  4. Step 4: Simplify right side
    662,408.20x = 394,451,563,585.02
  5. Step 5: Solve for x
    x = 394,451,563,585.02/662,408.20
  6. Step 6: Final answer
    x = 595,481.10

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Double scale
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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.