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Finding the Fourth Proportional to 279,624.70, 419,405.67 and 77,249.59

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Solution

The fourth proportional to 279,624.70, 419,405.67 and 77,249.59 is: 115,865.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,624.70 : 419,405.67 = 77,249.59 : x
  2. Step 2: Convert to fraction form
    279,624.70/419,405.67 = 77,249.59/x
  3. Step 3: Cross multiply
    279,624.70x = 419,405.67 × 77,249.59
  4. Step 4: Simplify right side
    279,624.70x = 32,398,916,051.18
  5. Step 5: Solve for x
    x = 32,398,916,051.18/279,624.70
  6. Step 6: Final answer
    x = 115,865.72

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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.