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Finding the Fourth Proportional to 638,328.83, 957,711.96 and 217,899.95

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Solution

The fourth proportional to 638,328.83, 957,711.96 and 217,899.95 is: 326,924.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,328.83 : 957,711.96 = 217,899.95 : x
  2. Step 2: Convert to fraction form
    638,328.83/957,711.96 = 217,899.95/x
  3. Step 3: Cross multiply
    638,328.83x = 957,711.96 × 217,899.95
  4. Step 4: Simplify right side
    638,328.83x = 208,685,383,409.84
  5. Step 5: Solve for x
    x = 208,685,383,409.84/638,328.83
  6. Step 6: Final answer
    x = 326,924.58

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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.