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Finding the Fourth Proportional to 379,129.60, 568,705.92 and 129,808

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Solution

The fourth proportional to 379,129.60, 568,705.92 and 129,808 is: 194,715.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,129.60 : 568,705.92 = 129,808 : x
  2. Step 2: Convert to fraction form
    379,129.60/568,705.92 = 129,808/x
  3. Step 3: Cross multiply
    379,129.60x = 568,705.92 × 129,808
  4. Step 4: Simplify right side
    379,129.60x = 73,822,578,063.36
  5. Step 5: Solve for x
    x = 73,822,578,063.36/379,129.60
  6. Step 6: Final answer
    x = 194,715.94

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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.