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Finding the Fourth Proportional to 388,979.20, 584,343.60 and 374,107.60

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Solution

The fourth proportional to 388,979.20, 584,343.60 and 374,107.60 is: 562,002.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,979.20 : 584,343.60 = 374,107.60 : x
  2. Step 2: Convert to fraction form
    388,979.20/584,343.60 = 374,107.60/x
  3. Step 3: Cross multiply
    388,979.20x = 584,343.60 × 374,107.60
  4. Step 4: Simplify right side
    388,979.20x = 218,607,381,771.36
  5. Step 5: Solve for x
    x = 218,607,381,771.36/388,979.20
  6. Step 6: Final answer
    x = 562,002.75

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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.