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Finding the Fourth Proportional to 403,005.20, 603,816.60 and 262,691.60

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Solution

The fourth proportional to 403,005.20, 603,816.60 and 262,691.60 is: 393,586.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,005.20 : 603,816.60 = 262,691.60 : x
  2. Step 2: Convert to fraction form
    403,005.20/603,816.60 = 262,691.60/x
  3. Step 3: Cross multiply
    403,005.20x = 603,816.60 × 262,691.60
  4. Step 4: Simplify right side
    403,005.20x = 158,617,548,760.56
  5. Step 5: Solve for x
    x = 158,617,548,760.56/403,005.20
  6. Step 6: Final answer
    x = 393,586.85

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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.