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Finding the Fourth Proportional to 385,861.61, 578,814.28 and 119,659.97

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Solution

The fourth proportional to 385,861.61, 578,814.28 and 119,659.97 is: 179,496.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,861.61 : 578,814.28 = 119,659.97 : x
  2. Step 2: Convert to fraction form
    385,861.61/578,814.28 = 119,659.97/x
  3. Step 3: Cross multiply
    385,861.61x = 578,814.28 × 119,659.97
  4. Step 4: Simplify right side
    385,861.61x = 69,260,896,486.30
  5. Step 5: Solve for x
    x = 69,260,896,486.30/385,861.61
  6. Step 6: Final answer
    x = 179,496.73

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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.