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Finding the Fourth Proportional to 307,391.60, 424,191.96 and 171,429.68

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Solution

The fourth proportional to 307,391.60, 424,191.96 and 171,429.68 is: 236,568.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,391.60 : 424,191.96 = 171,429.68 : x
  2. Step 2: Convert to fraction form
    307,391.60/424,191.96 = 171,429.68/x
  3. Step 3: Cross multiply
    307,391.60x = 424,191.96 × 171,429.68
  4. Step 4: Simplify right side
    307,391.60x = 72,719,091,961.37
  5. Step 5: Solve for x
    x = 72,719,091,961.37/307,391.60
  6. Step 6: Final answer
    x = 236,568.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.