Home / 421,123.82-581,151.11-230,137.21

Finding the Fourth Proportional to 421,123.82, 581,151.11 and 230,137.21

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Solution

The fourth proportional to 421,123.82, 581,151.11 and 230,137.21 is: 317,589.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,123.82 : 581,151.11 = 230,137.21 : x
  2. Step 2: Convert to fraction form
    421,123.82/581,151.11 = 230,137.21/x
  3. Step 3: Cross multiply
    421,123.82x = 581,151.11 × 230,137.21
  4. Step 4: Simplify right side
    421,123.82x = 133,744,495,043.80
  5. Step 5: Solve for x
    x = 133,744,495,043.80/421,123.82
  6. Step 6: Final answer
    x = 317,589.48

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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.