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Finding the Fourth Proportional to 318,997.70, 478,562.17 and 219,204.89

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Solution

The fourth proportional to 318,997.70, 478,562.17 and 219,204.89 is: 328,852.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,997.70 : 478,562.17 = 219,204.89 : x
  2. Step 2: Convert to fraction form
    318,997.70/478,562.17 = 219,204.89/x
  3. Step 3: Cross multiply
    318,997.70x = 478,562.17 × 219,204.89
  4. Step 4: Simplify right side
    318,997.70x = 104,903,168,481.40
  5. Step 5: Solve for x
    x = 104,903,168,481.40/318,997.70
  6. Step 6: Final answer
    x = 328,852.43

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1.5x scale

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.