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Finding the Fourth Proportional to 489,423.55, 675,409.10 and 274,568.22

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Solution

The fourth proportional to 489,423.55, 675,409.10 and 274,568.22 is: 378,906.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,423.55 : 675,409.10 = 274,568.22 : x
  2. Step 2: Convert to fraction form
    489,423.55/675,409.10 = 274,568.22/x
  3. Step 3: Cross multiply
    489,423.55x = 675,409.10 × 274,568.22
  4. Step 4: Simplify right side
    489,423.55x = 185,445,874,358.80
  5. Step 5: Solve for x
    x = 185,445,874,358.80/489,423.55
  6. Step 6: Final answer
    x = 378,906.72

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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.