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Finding the Fourth Proportional to 398,568.60, 597,647.70 and 118,049.40

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Solution

The fourth proportional to 398,568.60, 597,647.70 and 118,049.40 is: 177,013.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,568.60 : 597,647.70 = 118,049.40 : x
  2. Step 2: Convert to fraction form
    398,568.60/597,647.70 = 118,049.40/x
  3. Step 3: Cross multiply
    398,568.60x = 597,647.70 × 118,049.40
  4. Step 4: Simplify right side
    398,568.60x = 70,551,952,396.38
  5. Step 5: Solve for x
    x = 70,551,952,396.38/398,568.60
  6. Step 6: Final answer
    x = 177,013.32

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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.