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Finding the Fourth Proportional to 355,489.60, 533,234.40 and 261,011.20

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Solution

The fourth proportional to 355,489.60, 533,234.40 and 261,011.20 is: 391,516.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,489.60 : 533,234.40 = 261,011.20 : x
  2. Step 2: Convert to fraction form
    355,489.60/533,234.40 = 261,011.20/x
  3. Step 3: Cross multiply
    355,489.60x = 533,234.40 × 261,011.20
  4. Step 4: Simplify right side
    355,489.60x = 139,180,150,625.28
  5. Step 5: Solve for x
    x = 139,180,150,625.28/355,489.60
  6. Step 6: Final answer
    x = 391,516.80

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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.