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Finding the Fourth Proportional to 638,469.60, 957,218.40 and 323,152.80

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Solution

The fourth proportional to 638,469.60, 957,218.40 and 323,152.80 is: 484,483.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,469.60 : 957,218.40 = 323,152.80 : x
  2. Step 2: Convert to fraction form
    638,469.60/957,218.40 = 323,152.80/x
  3. Step 3: Cross multiply
    638,469.60x = 957,218.40 × 323,152.80
  4. Step 4: Simplify right side
    638,469.60x = 309,327,806,171.52
  5. Step 5: Solve for x
    x = 309,327,806,171.52/638,469.60
  6. Step 6: Final answer
    x = 484,483.22

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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.