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Finding the Fourth Proportional to 665,983.72, 919,147.62 and 375,654.88

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Solution

The fourth proportional to 665,983.72, 919,147.62 and 375,654.88 is: 518,454.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,983.72 : 919,147.62 = 375,654.88 : x
  2. Step 2: Convert to fraction form
    665,983.72/919,147.62 = 375,654.88/x
  3. Step 3: Cross multiply
    665,983.72x = 919,147.62 × 375,654.88
  4. Step 4: Simplify right side
    665,983.72x = 345,282,288,893.39
  5. Step 5: Solve for x
    x = 345,282,288,893.39/665,983.72
  6. Step 6: Final answer
    x = 518,454.55

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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.