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Finding the Fourth Proportional to 385,889.73, 578,890.65 and 119,671.68

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Solution

The fourth proportional to 385,889.73, 578,890.65 and 119,671.68 is: 179,524.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,889.73 : 578,890.65 = 119,671.68 : x
  2. Step 2: Convert to fraction form
    385,889.73/578,890.65 = 119,671.68/x
  3. Step 3: Cross multiply
    385,889.73x = 578,890.65 × 119,671.68
  4. Step 4: Simplify right side
    385,889.73x = 69,276,816,621.79
  5. Step 5: Solve for x
    x = 69,276,816,621.79/385,889.73
  6. Step 6: Final answer
    x = 179,524.90

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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.