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Finding the Fourth Proportional to 287,665.88, 431,504.96 and 74,438.37

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Solution

The fourth proportional to 287,665.88, 431,504.96 and 74,438.37 is: 111,659.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,665.88 : 431,504.96 = 74,438.37 : x
  2. Step 2: Convert to fraction form
    287,665.88/431,504.96 = 74,438.37/x
  3. Step 3: Cross multiply
    287,665.88x = 431,504.96 × 74,438.37
  4. Step 4: Simplify right side
    287,665.88x = 32,120,525,497.12
  5. Step 5: Solve for x
    x = 32,120,525,497.12/287,665.88
  6. Step 6: Final answer
    x = 111,659.14

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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.