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Finding the Fourth Proportional to 671,644.80, 1,008,244.80 and 405,705.60

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Solution

The fourth proportional to 671,644.80, 1,008,244.80 and 405,705.60 is: 609,028.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,644.80 : 1,008,244.80 = 405,705.60 : x
  2. Step 2: Convert to fraction form
    671,644.80/1,008,244.80 = 405,705.60/x
  3. Step 3: Cross multiply
    671,644.80x = 1,008,244.80 × 405,705.60
  4. Step 4: Simplify right side
    671,644.80x = 409,050,561,530.88
  5. Step 5: Solve for x
    x = 409,050,561,530.88/671,644.80
  6. Step 6: Final answer
    x = 609,028.11

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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.