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Finding the Fourth Proportional to 307,640.49, 424,543.08 and 171,673.00

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Solution

The fourth proportional to 307,640.49, 424,543.08 and 171,673.00 is: 236,908.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,640.49 : 424,543.08 = 171,673.00 : x
  2. Step 2: Convert to fraction form
    307,640.49/424,543.08 = 171,673.00/x
  3. Step 3: Cross multiply
    307,640.49x = 424,543.08 × 171,673.00
  4. Step 4: Simplify right side
    307,640.49x = 72,882,583,111.48
  5. Step 5: Solve for x
    x = 72,882,583,111.48/307,640.49
  6. Step 6: Final answer
    x = 236,908.29

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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.