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Finding the Fourth Proportional to 307,372.92, 424,210.86 and 171,428.28

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Solution

The fourth proportional to 307,372.92, 424,210.86 and 171,428.28 is: 236,591.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,372.92 : 424,210.86 = 171,428.28 : x
  2. Step 2: Convert to fraction form
    307,372.92/424,210.86 = 171,428.28/x
  3. Step 3: Cross multiply
    307,372.92x = 424,210.86 × 171,428.28
  4. Step 4: Simplify right side
    307,372.92x = 72,721,738,087.12
  5. Step 5: Solve for x
    x = 72,721,738,087.12/307,372.92
  6. Step 6: Final answer
    x = 236,591.23

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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.