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Finding the Fourth Proportional to 287,620.32, 431,469.36 and 270,124.32

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Solution

The fourth proportional to 287,620.32, 431,469.36 and 270,124.32 is: 405,222.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,620.32 : 431,469.36 = 270,124.32 : x
  2. Step 2: Convert to fraction form
    287,620.32/431,469.36 = 270,124.32/x
  3. Step 3: Cross multiply
    287,620.32x = 431,469.36 × 270,124.32
  4. Step 4: Simplify right side
    287,620.32x = 116,550,367,470.84
  5. Step 5: Solve for x
    x = 116,550,367,470.84/287,620.32
  6. Step 6: Final answer
    x = 405,222.99

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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.