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Finding the Fourth Proportional to 272,012.40, 408,018.60 and 205,657.20

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Solution

The fourth proportional to 272,012.40, 408,018.60 and 205,657.20 is: 308,485.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,012.40 : 408,018.60 = 205,657.20 : x
  2. Step 2: Convert to fraction form
    272,012.40/408,018.60 = 205,657.20/x
  3. Step 3: Cross multiply
    272,012.40x = 408,018.60 × 205,657.20
  4. Step 4: Simplify right side
    272,012.40x = 83,911,962,823.92
  5. Step 5: Solve for x
    x = 83,911,962,823.92/272,012.40
  6. Step 6: Final answer
    x = 308,485.80

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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.