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Finding the Fourth Proportional to 469,302.92, 648,172.60 and 318,137.48

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Solution

The fourth proportional to 469,302.92, 648,172.60 and 318,137.48 is: 439,392.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,302.92 : 648,172.60 = 318,137.48 : x
  2. Step 2: Convert to fraction form
    469,302.92/648,172.60 = 318,137.48/x
  3. Step 3: Cross multiply
    469,302.92x = 648,172.60 × 318,137.48
  4. Step 4: Simplify right side
    469,302.92x = 206,207,997,569.05
  5. Step 5: Solve for x
    x = 206,207,997,569.05/469,302.92
  6. Step 6: Final answer
    x = 439,392.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.