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Finding the Fourth Proportional to 272,856.80, 409,285.20 and 262,359.20

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Solution

The fourth proportional to 272,856.80, 409,285.20 and 262,359.20 is: 393,538.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,856.80 : 409,285.20 = 262,359.20 : x
  2. Step 2: Convert to fraction form
    272,856.80/409,285.20 = 262,359.20/x
  3. Step 3: Cross multiply
    272,856.80x = 409,285.20 × 262,359.20
  4. Step 4: Simplify right side
    272,856.80x = 107,379,737,643.84
  5. Step 5: Solve for x
    x = 107,379,737,643.84/272,856.80
  6. Step 6: Final answer
    x = 393,538.80

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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.