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Finding the Fourth Proportional to 307,388.60, 424,187.82 and 171,426.68

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Solution

The fourth proportional to 307,388.60, 424,187.82 and 171,426.68 is: 236,564.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,388.60 : 424,187.82 = 171,426.68 : x
  2. Step 2: Convert to fraction form
    307,388.60/424,187.82 = 171,426.68/x
  3. Step 3: Cross multiply
    307,388.60x = 424,187.82 × 171,426.68
  4. Step 4: Simplify right side
    307,388.60x = 72,717,109,679.04
  5. Step 5: Solve for x
    x = 72,717,109,679.04/307,388.60
  6. Step 6: Final answer
    x = 236,564.11

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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.