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Finding the Fourth Proportional to 354,865.60, 531,002.40 and 261,553.60

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Solution

The fourth proportional to 354,865.60, 531,002.40 and 261,553.60 is: 391,375.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,865.60 : 531,002.40 = 261,553.60 : x
  2. Step 2: Convert to fraction form
    354,865.60/531,002.40 = 261,553.60/x
  3. Step 3: Cross multiply
    354,865.60x = 531,002.40 × 261,553.60
  4. Step 4: Simplify right side
    354,865.60x = 138,885,589,328.64
  5. Step 5: Solve for x
    x = 138,885,589,328.64/354,865.60
  6. Step 6: Final answer
    x = 391,375.18

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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.