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Finding the Fourth Proportional to 318,998.45, 478,563.29 and 219,205.64

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Solution

The fourth proportional to 318,998.45, 478,563.29 and 219,205.64 is: 328,853.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,998.45 : 478,563.29 = 219,205.64 : x
  2. Step 2: Convert to fraction form
    318,998.45/478,563.29 = 219,205.64/x
  3. Step 3: Cross multiply
    318,998.45x = 478,563.29 × 219,205.64
  4. Step 4: Simplify right side
    318,998.45x = 104,903,774,009.38
  5. Step 5: Solve for x
    x = 104,903,774,009.38/318,998.45
  6. Step 6: Final answer
    x = 328,853.55

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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.