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Finding the Fourth Proportional to 371,389.65, 512,519.87 and 218,434.29

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Solution

The fourth proportional to 371,389.65, 512,519.87 and 218,434.29 is: 301,440.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,389.65 : 512,519.87 = 218,434.29 : x
  2. Step 2: Convert to fraction form
    371,389.65/512,519.87 = 218,434.29/x
  3. Step 3: Cross multiply
    371,389.65x = 512,519.87 × 218,434.29
  4. Step 4: Simplify right side
    371,389.65x = 111,951,913,914.34
  5. Step 5: Solve for x
    x = 111,951,913,914.34/371,389.65
  6. Step 6: Final answer
    x = 301,440.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.