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Finding the Fourth Proportional to 393,433.60, 590,150.40 and 109,123.60

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Solution

The fourth proportional to 393,433.60, 590,150.40 and 109,123.60 is: 163,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,433.60 : 590,150.40 = 109,123.60 : x
  2. Step 2: Convert to fraction form
    393,433.60/590,150.40 = 109,123.60/x
  3. Step 3: Cross multiply
    393,433.60x = 590,150.40 × 109,123.60
  4. Step 4: Simplify right side
    393,433.60x = 64,399,336,189.44
  5. Step 5: Solve for x
    x = 64,399,336,189.44/393,433.60
  6. Step 6: Final answer
    x = 163,685.40

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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.