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Finding the Fourth Proportional to 280,618.52, 421,032.33 and 168,379.29

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Solution

The fourth proportional to 280,618.52, 421,032.33 and 168,379.29 is: 252,631.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,618.52 : 421,032.33 = 168,379.29 : x
  2. Step 2: Convert to fraction form
    280,618.52/421,032.33 = 168,379.29/x
  3. Step 3: Cross multiply
    280,618.52x = 421,032.33 × 168,379.29
  4. Step 4: Simplify right side
    280,618.52x = 70,893,124,792.45
  5. Step 5: Solve for x
    x = 70,893,124,792.45/280,618.52
  6. Step 6: Final answer
    x = 252,631.67

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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.