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Finding the Fourth Proportional to 285,437.30, 393,104.49 and 279,238.37

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Solution

The fourth proportional to 285,437.30, 393,104.49 and 279,238.37 is: 384,567.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,437.30 : 393,104.49 = 279,238.37 : x
  2. Step 2: Convert to fraction form
    285,437.30/393,104.49 = 279,238.37/x
  3. Step 3: Cross multiply
    285,437.30x = 393,104.49 × 279,238.37
  4. Step 4: Simplify right side
    285,437.30x = 109,769,857,027.28
  5. Step 5: Solve for x
    x = 109,769,857,027.28/285,437.30
  6. Step 6: Final answer
    x = 384,567.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.