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Finding the Fourth Proportional to 443,840.40, 665,652.60 and 128,264.40

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Solution

The fourth proportional to 443,840.40, 665,652.60 and 128,264.40 is: 192,365.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,840.40 : 665,652.60 = 128,264.40 : x
  2. Step 2: Convert to fraction form
    443,840.40/665,652.60 = 128,264.40/x
  3. Step 3: Cross multiply
    443,840.40x = 665,652.60 × 128,264.40
  4. Step 4: Simplify right side
    443,840.40x = 85,379,531,347.44
  5. Step 5: Solve for x
    x = 85,379,531,347.44/443,840.40
  6. Step 6: Final answer
    x = 192,365.39

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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.