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Finding the Fourth Proportional to 287,628.82, 431,482.11 and 270,132.82

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Solution

The fourth proportional to 287,628.82, 431,482.11 and 270,132.82 is: 405,235.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,628.82 : 431,482.11 = 270,132.82 : x
  2. Step 2: Convert to fraction form
    287,628.82/431,482.11 = 270,132.82/x
  3. Step 3: Cross multiply
    287,628.82x = 431,482.11 × 270,132.82
  4. Step 4: Simplify right side
    287,628.82x = 116,557,479,153.85
  5. Step 5: Solve for x
    x = 116,557,479,153.85/287,628.82
  6. Step 6: Final answer
    x = 405,235.74

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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.