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Finding the Fourth Proportional to 385,859.70, 578,811.42 and 119,658.06

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Solution

The fourth proportional to 385,859.70, 578,811.42 and 119,658.06 is: 179,493.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,859.70 : 578,811.42 = 119,658.06 : x
  2. Step 2: Convert to fraction form
    385,859.70/578,811.42 = 119,658.06/x
  3. Step 3: Cross multiply
    385,859.70x = 578,811.42 × 119,658.06
  4. Step 4: Simplify right side
    385,859.70x = 69,259,451,623.05
  5. Step 5: Solve for x
    x = 69,259,451,623.05/385,859.70
  6. Step 6: Final answer
    x = 179,493.87

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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.