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Finding the Fourth Proportional to 287,597.70, 431,396.55 and 263,103.30

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Solution

The fourth proportional to 287,597.70, 431,396.55 and 263,103.30 is: 394,654.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,597.70 : 431,396.55 = 263,103.30 : x
  2. Step 2: Convert to fraction form
    287,597.70/431,396.55 = 263,103.30/x
  3. Step 3: Cross multiply
    287,597.70x = 431,396.55 × 263,103.30
  4. Step 4: Simplify right side
    287,597.70x = 113,501,855,913.62
  5. Step 5: Solve for x
    x = 113,501,855,913.62/287,597.70
  6. Step 6: Final answer
    x = 394,654.95

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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.