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Finding the Fourth Proportional to 393,317.60, 589,979.64 and 112,843.76

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Solution

The fourth proportional to 393,317.60, 589,979.64 and 112,843.76 is: 169,266.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,317.60 : 589,979.64 = 112,843.76 : x
  2. Step 2: Convert to fraction form
    393,317.60/589,979.64 = 112,843.76/x
  3. Step 3: Cross multiply
    393,317.60x = 589,979.64 × 112,843.76
  4. Step 4: Simplify right side
    393,317.60x = 66,575,520,901.05
  5. Step 5: Solve for x
    x = 66,575,520,901.05/393,317.60
  6. Step 6: Final answer
    x = 169,266.57

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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.