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Finding the Fourth Proportional to 634,626.40, 951,939.60 and 213,858.40

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Solution

The fourth proportional to 634,626.40, 951,939.60 and 213,858.40 is: 320,787.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,626.40 : 951,939.60 = 213,858.40 : x
  2. Step 2: Convert to fraction form
    634,626.40/951,939.60 = 213,858.40/x
  3. Step 3: Cross multiply
    634,626.40x = 951,939.60 × 213,858.40
  4. Step 4: Simplify right side
    634,626.40x = 203,580,279,752.64
  5. Step 5: Solve for x
    x = 203,580,279,752.64/634,626.40
  6. Step 6: Final answer
    x = 320,787.60

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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.