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Finding the Fourth Proportional to 1,073,978.06, 1,482,142.94 and 666,211.30

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Solution

The fourth proportional to 1,073,978.06, 1,482,142.94 and 666,211.30 is: 919,404.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,073,978.06 : 1,482,142.94 = 666,211.30 : x
  2. Step 2: Convert to fraction form
    1,073,978.06/1,482,142.94 = 666,211.30/x
  3. Step 3: Cross multiply
    1,073,978.06x = 1,482,142.94 × 666,211.30
  4. Step 4: Simplify right side
    1,073,978.06x = 987,420,374,843.22
  5. Step 5: Solve for x
    x = 987,420,374,843.22/1,073,978.06
  6. Step 6: Final answer
    x = 919,404.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.