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Finding the Fourth Proportional to 499,926.54, 689,881.46 and 285,135.82

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Solution

The fourth proportional to 499,926.54, 689,881.46 and 285,135.82 is: 393,477.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,926.54 : 689,881.46 = 285,135.82 : x
  2. Step 2: Convert to fraction form
    499,926.54/689,881.46 = 285,135.82/x
  3. Step 3: Cross multiply
    499,926.54x = 689,881.46 × 285,135.82
  4. Step 4: Simplify right side
    499,926.54x = 196,709,915,799.90
  5. Step 5: Solve for x
    x = 196,709,915,799.90/499,926.54
  6. Step 6: Final answer
    x = 393,477.64

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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.