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Finding the Fourth Proportional to 665,105.40, 996,563.70 and 384,132.60

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Solution

The fourth proportional to 665,105.40, 996,563.70 and 384,132.60 is: 575,566.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,105.40 : 996,563.70 = 384,132.60 : x
  2. Step 2: Convert to fraction form
    665,105.40/996,563.70 = 384,132.60/x
  3. Step 3: Cross multiply
    665,105.40x = 996,563.70 × 384,132.60
  4. Step 4: Simplify right side
    665,105.40x = 382,812,605,146.62
  5. Step 5: Solve for x
    x = 382,812,605,146.62/665,105.40
  6. Step 6: Final answer
    x = 575,566.83

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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.