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Finding the Fourth Proportional to 492,780.80, 739,171.20 and 405,300.80

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Solution

The fourth proportional to 492,780.80, 739,171.20 and 405,300.80 is: 607,951.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,780.80 : 739,171.20 = 405,300.80 : x
  2. Step 2: Convert to fraction form
    492,780.80/739,171.20 = 405,300.80/x
  3. Step 3: Cross multiply
    492,780.80x = 739,171.20 × 405,300.80
  4. Step 4: Simplify right side
    492,780.80x = 299,586,678,696.96
  5. Step 5: Solve for x
    x = 299,586,678,696.96/492,780.80
  6. Step 6: Final answer
    x = 607,951.20

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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.