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Finding the Fourth Proportional to 307,389.84, 424,200.45 and 171,432.56

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Solution

The fourth proportional to 307,389.84, 424,200.45 and 171,432.56 is: 236,578.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,389.84 : 424,200.45 = 171,432.56 : x
  2. Step 2: Convert to fraction form
    307,389.84/424,200.45 = 171,432.56/x
  3. Step 3: Cross multiply
    307,389.84x = 424,200.45 × 171,432.56
  4. Step 4: Simplify right side
    307,389.84x = 72,721,766,975.65
  5. Step 5: Solve for x
    x = 72,721,766,975.65/307,389.84
  6. Step 6: Final answer
    x = 236,578.30

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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.