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Finding the Fourth Proportional to 666,435.60, 919,679.40 and 364,629.60

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Solution

The fourth proportional to 666,435.60, 919,679.40 and 364,629.60 is: 503,187.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,435.60 : 919,679.40 = 364,629.60 : x
  2. Step 2: Convert to fraction form
    666,435.60/919,679.40 = 364,629.60/x
  3. Step 3: Cross multiply
    666,435.60x = 919,679.40 × 364,629.60
  4. Step 4: Simplify right side
    666,435.60x = 335,342,331,750.24
  5. Step 5: Solve for x
    x = 335,342,331,750.24/666,435.60
  6. Step 6: Final answer
    x = 503,187.90

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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.