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Finding the Fourth Proportional to 379,435, 523,707.60 and 218,383.06

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Solution

The fourth proportional to 379,435, 523,707.60 and 218,383.06 is: 301,418.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,435 : 523,707.60 = 218,383.06 : x
  2. Step 2: Convert to fraction form
    379,435/523,707.60 = 218,383.06/x
  3. Step 3: Cross multiply
    379,435x = 523,707.60 × 218,383.06
  4. Step 4: Simplify right side
    379,435x = 114,368,868,233.26
  5. Step 5: Solve for x
    x = 114,368,868,233.26/379,435
  6. Step 6: Final answer
    x = 301,418.87

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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.