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Finding the Fourth Proportional to 630,601.20, 945,901.80 and 394,405.20

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Solution

The fourth proportional to 630,601.20, 945,901.80 and 394,405.20 is: 591,607.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,601.20 : 945,901.80 = 394,405.20 : x
  2. Step 2: Convert to fraction form
    630,601.20/945,901.80 = 394,405.20/x
  3. Step 3: Cross multiply
    630,601.20x = 945,901.80 × 394,405.20
  4. Step 4: Simplify right side
    630,601.20x = 373,068,588,609.36
  5. Step 5: Solve for x
    x = 373,068,588,609.36/630,601.20
  6. Step 6: Final answer
    x = 591,607.80

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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.