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Finding the Fourth Proportional to 630,171.40, 945,257.10 and 209,512.20

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Solution

The fourth proportional to 630,171.40, 945,257.10 and 209,512.20 is: 314,268.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,171.40 : 945,257.10 = 209,512.20 : x
  2. Step 2: Convert to fraction form
    630,171.40/945,257.10 = 209,512.20/x
  3. Step 3: Cross multiply
    630,171.40x = 945,257.10 × 209,512.20
  4. Step 4: Simplify right side
    630,171.40x = 198,042,894,586.62
  5. Step 5: Solve for x
    x = 198,042,894,586.62/630,171.40
  6. Step 6: Final answer
    x = 314,268.30

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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.