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Finding the Fourth Proportional to 371,389.15, 512,519.12 and 218,433.79

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Solution

The fourth proportional to 371,389.15, 512,519.12 and 218,433.79 is: 301,439.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,389.15 : 512,519.12 = 218,433.79 : x
  2. Step 2: Convert to fraction form
    371,389.15/512,519.12 = 218,433.79/x
  3. Step 3: Cross multiply
    371,389.15x = 512,519.12 × 218,433.79
  4. Step 4: Simplify right side
    371,389.15x = 111,951,490,174.30
  5. Step 5: Solve for x
    x = 111,951,490,174.30/371,389.15
  6. Step 6: Final answer
    x = 301,439.86

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1.5x scale

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.