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Finding the Fourth Proportional to 329,590.45, 493,820.61 and 221,316.85

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Solution

The fourth proportional to 329,590.45, 493,820.61 and 221,316.85 is: 331,595.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,590.45 : 493,820.61 = 221,316.85 : x
  2. Step 2: Convert to fraction form
    329,590.45/493,820.61 = 221,316.85/x
  3. Step 3: Cross multiply
    329,590.45x = 493,820.61 × 221,316.85
  4. Step 4: Simplify right side
    329,590.45x = 109,290,820,763.69
  5. Step 5: Solve for x
    x = 109,290,820,763.69/329,590.45
  6. Step 6: Final answer
    x = 331,595.84

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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.