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Finding the Fourth Proportional to 385,864.43, 578,818.50 and 119,662.79

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Solution

The fourth proportional to 385,864.43, 578,818.50 and 119,662.79 is: 179,500.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,864.43 : 578,818.50 = 119,662.79 : x
  2. Step 2: Convert to fraction form
    385,864.43/578,818.50 = 119,662.79/x
  3. Step 3: Cross multiply
    385,864.43x = 578,818.50 × 119,662.79
  4. Step 4: Simplify right side
    385,864.43x = 69,263,036,015.30
  5. Step 5: Solve for x
    x = 69,263,036,015.30/385,864.43
  6. Step 6: Final answer
    x = 179,500.96

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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.