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Finding the Fourth Proportional to 379,391.40, 569,115.90 and 113,131.08

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Solution

The fourth proportional to 379,391.40, 569,115.90 and 113,131.08 is: 169,705.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,391.40 : 569,115.90 = 113,131.08 : x
  2. Step 2: Convert to fraction form
    379,391.40/569,115.90 = 113,131.08/x
  3. Step 3: Cross multiply
    379,391.40x = 569,115.90 × 113,131.08
  4. Step 4: Simplify right side
    379,391.40x = 64,384,696,412.17
  5. Step 5: Solve for x
    x = 64,384,696,412.17/379,391.40
  6. Step 6: Final answer
    x = 169,705.21

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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.