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Finding the Fourth Proportional to 279,033.60, 385,067.20 and 151,709.68

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Solution

The fourth proportional to 279,033.60, 385,067.20 and 151,709.68 is: 209,359.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,033.60 : 385,067.20 = 151,709.68 : x
  2. Step 2: Convert to fraction form
    279,033.60/385,067.20 = 151,709.68/x
  3. Step 3: Cross multiply
    279,033.60x = 385,067.20 × 151,709.68
  4. Step 4: Simplify right side
    279,033.60x = 58,418,421,690.50
  5. Step 5: Solve for x
    x = 58,418,421,690.50/279,033.60
  6. Step 6: Final answer
    x = 209,359.81

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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.