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Finding the Fourth Proportional to 637,811.20, 954,873.60 and 388,979.20

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Solution

The fourth proportional to 637,811.20, 954,873.60 and 388,979.20 is: 582,344.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,811.20 : 954,873.60 = 388,979.20 : x
  2. Step 2: Convert to fraction form
    637,811.20/954,873.60 = 388,979.20/x
  3. Step 3: Cross multiply
    637,811.20x = 954,873.60 × 388,979.20
  4. Step 4: Simplify right side
    637,811.20x = 371,425,969,029.12
  5. Step 5: Solve for x
    x = 371,425,969,029.12/637,811.20
  6. Step 6: Final answer
    x = 582,344.70

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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.