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Finding the Fourth Proportional to 272,012.90, 408,019.35 and 205,657.70

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Solution

The fourth proportional to 272,012.90, 408,019.35 and 205,657.70 is: 308,486.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,012.90 : 408,019.35 = 205,657.70 : x
  2. Step 2: Convert to fraction form
    272,012.90/408,019.35 = 205,657.70/x
  3. Step 3: Cross multiply
    272,012.90x = 408,019.35 × 205,657.70
  4. Step 4: Simplify right side
    272,012.90x = 83,912,321,076.50
  5. Step 5: Solve for x
    x = 83,912,321,076.50/272,012.90
  6. Step 6: Final answer
    x = 308,486.55

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1.5x scale

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.