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Finding the Fourth Proportional to 443,708.12, 665,562.20 and 405,216.92

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Solution

The fourth proportional to 443,708.12, 665,562.20 and 405,216.92 is: 607,825.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,708.12 : 665,562.20 = 405,216.92 : x
  2. Step 2: Convert to fraction form
    443,708.12/665,562.20 = 405,216.92/x
  3. Step 3: Cross multiply
    443,708.12x = 665,562.20 × 405,216.92
  4. Step 4: Simplify right side
    443,708.12x = 269,697,064,390.25
  5. Step 5: Solve for x
    x = 269,697,064,390.25/443,708.12
  6. Step 6: Final answer
    x = 607,825.39

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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.