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Finding the Fourth Proportional to 630,218.60, 945,327.90 and 209,439.80

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Solution

The fourth proportional to 630,218.60, 945,327.90 and 209,439.80 is: 314,159.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,218.60 : 945,327.90 = 209,439.80 : x
  2. Step 2: Convert to fraction form
    630,218.60/945,327.90 = 209,439.80/x
  3. Step 3: Cross multiply
    630,218.60x = 945,327.90 × 209,439.80
  4. Step 4: Simplify right side
    630,218.60x = 197,989,286,310.42
  5. Step 5: Solve for x
    x = 197,989,286,310.42/630,218.60
  6. Step 6: Final answer
    x = 314,159.70

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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.