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Finding the Fourth Proportional to 638,334.84, 957,720.96 and 217,905.96

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Solution

The fourth proportional to 638,334.84, 957,720.96 and 217,905.96 is: 326,933.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,334.84 : 957,720.96 = 217,905.96 : x
  2. Step 2: Convert to fraction form
    638,334.84/957,720.96 = 217,905.96/x
  3. Step 3: Cross multiply
    638,334.84x = 957,720.96 × 217,905.96
  4. Step 4: Simplify right side
    638,334.84x = 208,693,105,200.92
  5. Step 5: Solve for x
    x = 208,693,105,200.92/638,334.84
  6. Step 6: Final answer
    x = 326,933.60

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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.