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Finding the Fourth Proportional to 371,388.65, 512,518.49 and 218,433.29

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Solution

The fourth proportional to 371,388.65, 512,518.49 and 218,433.29 is: 301,439.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,388.65 : 512,518.49 = 218,433.29 : x
  2. Step 2: Convert to fraction form
    371,388.65/512,518.49 = 218,433.29/x
  3. Step 3: Cross multiply
    371,388.65x = 512,518.49 × 218,433.29
  4. Step 4: Simplify right side
    371,388.65x = 111,951,096,301.77
  5. Step 5: Solve for x
    x = 111,951,096,301.77/371,388.65
  6. Step 6: Final answer
    x = 301,439.20

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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.