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Finding the Fourth Proportional to 386,931.60, 580,834.80 and 298,576.80

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Solution

The fourth proportional to 386,931.60, 580,834.80 and 298,576.80 is: 448,202.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,931.60 : 580,834.80 = 298,576.80 : x
  2. Step 2: Convert to fraction form
    386,931.60/580,834.80 = 298,576.80/x
  3. Step 3: Cross multiply
    386,931.60x = 580,834.80 × 298,576.80
  4. Step 4: Simplify right side
    386,931.60x = 173,423,795,912.64
  5. Step 5: Solve for x
    x = 173,423,795,912.64/386,931.60
  6. Step 6: Final answer
    x = 448,202.72

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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.