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Finding the Fourth Proportional to 315,408.80, 472,940.40 and 104,938.40

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Solution

The fourth proportional to 315,408.80, 472,940.40 and 104,938.40 is: 157,350.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,408.80 : 472,940.40 = 104,938.40 : x
  2. Step 2: Convert to fraction form
    315,408.80/472,940.40 = 104,938.40/x
  3. Step 3: Cross multiply
    315,408.80x = 472,940.40 × 104,938.40
  4. Step 4: Simplify right side
    315,408.80x = 49,629,608,871.36
  5. Step 5: Solve for x
    x = 49,629,608,871.36/315,408.80
  6. Step 6: Final answer
    x = 157,350.11

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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.