Home / 354,379.70-531,569.55-221,519.45

Finding the Fourth Proportional to 354,379.70, 531,569.55 and 221,519.45

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Solution

The fourth proportional to 354,379.70, 531,569.55 and 221,519.45 is: 332,279.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,379.70 : 531,569.55 = 221,519.45 : x
  2. Step 2: Convert to fraction form
    354,379.70/531,569.55 = 221,519.45/x
  3. Step 3: Cross multiply
    354,379.70x = 531,569.55 × 221,519.45
  4. Step 4: Simplify right side
    354,379.70x = 117,752,994,352.75
  5. Step 5: Solve for x
    x = 117,752,994,352.75/354,379.70
  6. Step 6: Final answer
    x = 332,279.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.