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Finding the Fourth Proportional to 421,679.40, 632,810.70 and 303,435.60

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Solution

The fourth proportional to 421,679.40, 632,810.70 and 303,435.60 is: 455,363.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,679.40 : 632,810.70 = 303,435.60 : x
  2. Step 2: Convert to fraction form
    421,679.40/632,810.70 = 303,435.60/x
  3. Step 3: Cross multiply
    421,679.40x = 632,810.70 × 303,435.60
  4. Step 4: Simplify right side
    421,679.40x = 192,017,294,440.92
  5. Step 5: Solve for x
    x = 192,017,294,440.92/421,679.40
  6. Step 6: Final answer
    x = 455,363.23

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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.