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Finding the Fourth Proportional to 400,630.20, 600,945.30 and 120,147.45

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Solution

The fourth proportional to 400,630.20, 600,945.30 and 120,147.45 is: 180,221.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,630.20 : 600,945.30 = 120,147.45 : x
  2. Step 2: Convert to fraction form
    400,630.20/600,945.30 = 120,147.45/x
  3. Step 3: Cross multiply
    400,630.20x = 600,945.30 × 120,147.45
  4. Step 4: Simplify right side
    400,630.20x = 72,202,045,384.49
  5. Step 5: Solve for x
    x = 72,202,045,384.49/400,630.20
  6. Step 6: Final answer
    x = 180,221.18

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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.