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Finding the Fourth Proportional to 307,385.77, 424,191.54 and 171,419.87

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Solution

The fourth proportional to 307,385.77, 424,191.54 and 171,419.87 is: 236,558.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,385.77 : 424,191.54 = 171,419.87 : x
  2. Step 2: Convert to fraction form
    307,385.77/424,191.54 = 171,419.87/x
  3. Step 3: Cross multiply
    307,385.77x = 424,191.54 × 171,419.87
  4. Step 4: Simplify right side
    307,385.77x = 72,714,859,380.97
  5. Step 5: Solve for x
    x = 72,714,859,380.97/307,385.77
  6. Step 6: Final answer
    x = 236,558.96

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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.