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Finding the Fourth Proportional to 421,372.13, 581,489.57 and 230,383.49

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Solution

The fourth proportional to 421,372.13, 581,489.57 and 230,383.49 is: 317,927.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,372.13 : 581,489.57 = 230,383.49 : x
  2. Step 2: Convert to fraction form
    421,372.13/581,489.57 = 230,383.49/x
  3. Step 3: Cross multiply
    421,372.13x = 581,489.57 × 230,383.49
  4. Step 4: Simplify right side
    421,372.13x = 133,965,595,383.28
  5. Step 5: Solve for x
    x = 133,965,595,383.28/421,372.13
  6. Step 6: Final answer
    x = 317,927.04

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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.