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Finding the Fourth Proportional to 387,392.80, 580,756.36 and 134,640.46

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Solution

The fourth proportional to 387,392.80, 580,756.36 and 134,640.46 is: 201,845.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,392.80 : 580,756.36 = 134,640.46 : x
  2. Step 2: Convert to fraction form
    387,392.80/580,756.36 = 134,640.46/x
  3. Step 3: Cross multiply
    387,392.80x = 580,756.36 × 134,640.46
  4. Step 4: Simplify right side
    387,392.80x = 78,193,303,458.33
  5. Step 5: Solve for x
    x = 78,193,303,458.33/387,392.80
  6. Step 6: Final answer
    x = 201,845.01

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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.