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Finding the Fourth Proportional to 489,000.87, 674,853.60 and 274,154.85

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Solution

The fourth proportional to 489,000.87, 674,853.60 and 274,154.85 is: 378,351.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,000.87 : 674,853.60 = 274,154.85 : x
  2. Step 2: Convert to fraction form
    489,000.87/674,853.60 = 274,154.85/x
  3. Step 3: Cross multiply
    489,000.87x = 674,853.60 × 274,154.85
  4. Step 4: Simplify right side
    489,000.87x = 185,014,387,479.96
  5. Step 5: Solve for x
    x = 185,014,387,479.96/489,000.87
  6. Step 6: Final answer
    x = 378,351.86

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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.