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Finding the Fourth Proportional to 385,608.60, 578,412.90 and 119,450.70

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Solution

The fourth proportional to 385,608.60, 578,412.90 and 119,450.70 is: 179,176.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,608.60 : 578,412.90 = 119,450.70 : x
  2. Step 2: Convert to fraction form
    385,608.60/578,412.90 = 119,450.70/x
  3. Step 3: Cross multiply
    385,608.60x = 578,412.90 × 119,450.70
  4. Step 4: Simplify right side
    385,608.60x = 69,091,825,794.03
  5. Step 5: Solve for x
    x = 69,091,825,794.03/385,608.60
  6. Step 6: Final answer
    x = 179,176.05

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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.