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Finding the Fourth Proportional to 421,676.40, 632,806.20 and 303,432.60

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Solution

The fourth proportional to 421,676.40, 632,806.20 and 303,432.60 is: 455,358.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,676.40 : 632,806.20 = 303,432.60 : x
  2. Step 2: Convert to fraction form
    421,676.40/632,806.20 = 303,432.60/x
  3. Step 3: Cross multiply
    421,676.40x = 632,806.20 × 303,432.60
  4. Step 4: Simplify right side
    421,676.40x = 192,014,030,562.12
  5. Step 5: Solve for x
    x = 192,014,030,562.12/421,676.40
  6. Step 6: Final answer
    x = 455,358.73

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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.