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Finding the Fourth Proportional to 272,040.90, 408,061.35 and 205,685.70

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Solution

The fourth proportional to 272,040.90, 408,061.35 and 205,685.70 is: 308,528.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,040.90 : 408,061.35 = 205,685.70 : x
  2. Step 2: Convert to fraction form
    272,040.90/408,061.35 = 205,685.70/x
  3. Step 3: Cross multiply
    272,040.90x = 408,061.35 × 205,685.70
  4. Step 4: Simplify right side
    272,040.90x = 83,932,384,417.70
  5. Step 5: Solve for x
    x = 83,932,384,417.70/272,040.90
  6. Step 6: Final answer
    x = 308,528.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.