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Finding the Fourth Proportional to 276,423.60, 415,072.80 and 209,938.80

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Solution

The fourth proportional to 276,423.60, 415,072.80 and 209,938.80 is: 315,240.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,423.60 : 415,072.80 = 209,938.80 : x
  2. Step 2: Convert to fraction form
    276,423.60/415,072.80 = 209,938.80/x
  3. Step 3: Cross multiply
    276,423.60x = 415,072.80 × 209,938.80
  4. Step 4: Simplify right side
    276,423.60x = 87,139,885,544.64
  5. Step 5: Solve for x
    x = 87,139,885,544.64/276,423.60
  6. Step 6: Final answer
    x = 315,240.40

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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.