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Finding the Fourth Proportional to 421,973.40, 633,251.70 and 303,745.80

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Solution

The fourth proportional to 421,973.40, 633,251.70 and 303,745.80 is: 455,828.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,973.40 : 633,251.70 = 303,745.80 : x
  2. Step 2: Convert to fraction form
    421,973.40/633,251.70 = 303,745.80/x
  3. Step 3: Cross multiply
    421,973.40x = 633,251.70 × 303,745.80
  4. Step 4: Simplify right side
    421,973.40x = 192,347,544,217.86
  5. Step 5: Solve for x
    x = 192,347,544,217.86/421,973.40
  6. Step 6: Final answer
    x = 455,828.60

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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.