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Finding the Fourth Proportional to 287,996.00, 431,643.60 and 203,780.39

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Solution

The fourth proportional to 287,996.00, 431,643.60 and 203,780.39 is: 305,422.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,996.00 : 431,643.60 = 203,780.39 : x
  2. Step 2: Convert to fraction form
    287,996.00/431,643.60 = 203,780.39/x
  3. Step 3: Cross multiply
    287,996.00x = 431,643.60 × 203,780.39
  4. Step 4: Simplify right side
    287,996.00x = 87,960,498,990.79
  5. Step 5: Solve for x
    x = 87,960,498,990.79/287,996.00
  6. Step 6: Final answer
    x = 305,422.65

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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.