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Finding the Fourth Proportional to 287,628.32, 431,481.36 and 270,132.32

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Solution

The fourth proportional to 287,628.32, 431,481.36 and 270,132.32 is: 405,234.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,628.32 : 431,481.36 = 270,132.32 : x
  2. Step 2: Convert to fraction form
    287,628.32/431,481.36 = 270,132.32/x
  3. Step 3: Cross multiply
    287,628.32x = 431,481.36 × 270,132.32
  4. Step 4: Simplify right side
    287,628.32x = 116,557,060,813.56
  5. Step 5: Solve for x
    x = 116,557,060,813.56/287,628.32
  6. Step 6: Final answer
    x = 405,234.99

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1.5x scale

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.