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Finding the Fourth Proportional to 638,302.20, 957,453.30 and 458,940.86

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Solution

The fourth proportional to 638,302.20, 957,453.30 and 458,940.86 is: 688,411.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,302.20 : 957,453.30 = 458,940.86 : x
  2. Step 2: Convert to fraction form
    638,302.20/957,453.30 = 458,940.86/x
  3. Step 3: Cross multiply
    638,302.20x = 957,453.30 × 458,940.86
  4. Step 4: Simplify right side
    638,302.20x = 439,414,443,305.47
  5. Step 5: Solve for x
    x = 439,414,443,305.47/638,302.20
  6. Step 6: Final answer
    x = 688,411.29

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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.