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Finding the Fourth Proportional to 639,565.40, 959,693.70 and 284,634.20

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Solution

The fourth proportional to 639,565.40, 959,693.70 and 284,634.20 is: 427,105.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,565.40 : 959,693.70 = 284,634.20 : x
  2. Step 2: Convert to fraction form
    639,565.40/959,693.70 = 284,634.20/x
  3. Step 3: Cross multiply
    639,565.40x = 959,693.70 × 284,634.20
  4. Step 4: Simplify right side
    639,565.40x = 273,161,648,544.54
  5. Step 5: Solve for x
    x = 273,161,648,544.54/639,565.40
  6. Step 6: Final answer
    x = 427,105.11

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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.