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Finding the Fourth Proportional to 385,861.11, 578,813.53 and 119,659.47

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Solution

The fourth proportional to 385,861.11, 578,813.53 and 119,659.47 is: 179,495.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,861.11 : 578,813.53 = 119,659.47 : x
  2. Step 2: Convert to fraction form
    385,861.11/578,813.53 = 119,659.47/x
  3. Step 3: Cross multiply
    385,861.11x = 578,813.53 × 119,659.47
  4. Step 4: Simplify right side
    385,861.11x = 69,260,517,983.29
  5. Step 5: Solve for x
    x = 69,260,517,983.29/385,861.11
  6. Step 6: Final answer
    x = 179,495.98

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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.