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Finding the Fourth Proportional to 443,847.12, 665,765.16 and 422,330.70

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Solution

The fourth proportional to 443,847.12, 665,765.16 and 422,330.70 is: 633,490.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,847.12 : 665,765.16 = 422,330.70 : x
  2. Step 2: Convert to fraction form
    443,847.12/665,765.16 = 422,330.70/x
  3. Step 3: Cross multiply
    443,847.12x = 665,765.16 × 422,330.70
  4. Step 4: Simplify right side
    443,847.12x = 281,173,066,058.41
  5. Step 5: Solve for x
    x = 281,173,066,058.41/443,847.12
  6. Step 6: Final answer
    x = 633,490.80

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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.