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Finding the Fourth Proportional to 639,654.66, 959,629.62 and 340,423.86

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Solution

The fourth proportional to 639,654.66, 959,629.62 and 340,423.86 is: 510,714.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,654.66 : 959,629.62 = 340,423.86 : x
  2. Step 2: Convert to fraction form
    639,654.66/959,629.62 = 340,423.86/x
  3. Step 3: Cross multiply
    639,654.66x = 959,629.62 × 340,423.86
  4. Step 4: Simplify right side
    639,654.66x = 326,680,819,410.73
  5. Step 5: Solve for x
    x = 326,680,819,410.73/639,654.66
  6. Step 6: Final answer
    x = 510,714.36

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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.