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Finding the Fourth Proportional to 355,909.20, 533,086.20 and 276,399.60

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Solution

The fourth proportional to 355,909.20, 533,086.20 and 276,399.60 is: 413,995.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,909.20 : 533,086.20 = 276,399.60 : x
  2. Step 2: Convert to fraction form
    355,909.20/533,086.20 = 276,399.60/x
  3. Step 3: Cross multiply
    355,909.20x = 533,086.20 × 276,399.60
  4. Step 4: Simplify right side
    355,909.20x = 147,344,812,445.52
  5. Step 5: Solve for x
    x = 147,344,812,445.52/355,909.20
  6. Step 6: Final answer
    x = 413,995.51

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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.