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Finding the Fourth Proportional to 379,812.30, 569,362.05 and 143,313.90

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Solution

The fourth proportional to 379,812.30, 569,362.05 and 143,313.90 is: 214,836.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,812.30 : 569,362.05 = 143,313.90 : x
  2. Step 2: Convert to fraction form
    379,812.30/569,362.05 = 143,313.90/x
  3. Step 3: Cross multiply
    379,812.30x = 569,362.05 × 143,313.90
  4. Step 4: Simplify right side
    379,812.30x = 81,597,495,897.50
  5. Step 5: Solve for x
    x = 81,597,495,897.50/379,812.30
  6. Step 6: Final answer
    x = 214,836.37

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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.