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Finding the Fourth Proportional to 426,365.92, 639,497.94 and 331,690.60

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Solution

The fourth proportional to 426,365.92, 639,497.94 and 331,690.60 is: 497,496.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,365.92 : 639,497.94 = 331,690.60 : x
  2. Step 2: Convert to fraction form
    426,365.92/639,497.94 = 331,690.60/x
  3. Step 3: Cross multiply
    426,365.92x = 639,497.94 × 331,690.60
  4. Step 4: Simplify right side
    426,365.92x = 212,115,455,417.36
  5. Step 5: Solve for x
    x = 212,115,455,417.36/426,365.92
  6. Step 6: Final answer
    x = 497,496.27

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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.