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Finding the Fourth Proportional to 445,839.60, 668,840.40 and 146,236.80

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Solution

The fourth proportional to 445,839.60, 668,840.40 and 146,236.80 is: 219,381.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,839.60 : 668,840.40 = 146,236.80 : x
  2. Step 2: Convert to fraction form
    445,839.60/668,840.40 = 146,236.80/x
  3. Step 3: Cross multiply
    445,839.60x = 668,840.40 × 146,236.80
  4. Step 4: Simplify right side
    445,839.60x = 97,809,079,806.72
  5. Step 5: Solve for x
    x = 97,809,079,806.72/445,839.60
  6. Step 6: Final answer
    x = 219,381.77

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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.