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Finding the Fourth Proportional to 630,607.20, 945,910.80 and 394,411.20

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Solution

The fourth proportional to 630,607.20, 945,910.80 and 394,411.20 is: 591,616.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,607.20 : 945,910.80 = 394,411.20 : x
  2. Step 2: Convert to fraction form
    630,607.20/945,910.80 = 394,411.20/x
  3. Step 3: Cross multiply
    630,607.20x = 945,910.80 × 394,411.20
  4. Step 4: Simplify right side
    630,607.20x = 373,077,813,720.96
  5. Step 5: Solve for x
    x = 373,077,813,720.96/630,607.20
  6. Step 6: Final answer
    x = 591,616.80

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.