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Finding the Fourth Proportional to 303,638.72, 419,024.78 and 167,672.40

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Solution

The fourth proportional to 303,638.72, 419,024.78 and 167,672.40 is: 231,389.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,638.72 : 419,024.78 = 167,672.40 : x
  2. Step 2: Convert to fraction form
    303,638.72/419,024.78 = 167,672.40/x
  3. Step 3: Cross multiply
    303,638.72x = 419,024.78 × 167,672.40
  4. Step 4: Simplify right side
    303,638.72x = 70,258,890,522.07
  5. Step 5: Solve for x
    x = 70,258,890,522.07/303,638.72
  6. Step 6: Final answer
    x = 231,389.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.