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Finding the Fourth Proportional to 328,052.40, 491,387.40 and 272,756.40

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Solution

The fourth proportional to 328,052.40, 491,387.40 and 272,756.40 is: 408,559.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,052.40 : 491,387.40 = 272,756.40 : x
  2. Step 2: Convert to fraction form
    328,052.40/491,387.40 = 272,756.40/x
  3. Step 3: Cross multiply
    328,052.40x = 491,387.40 × 272,756.40
  4. Step 4: Simplify right side
    328,052.40x = 134,029,058,229.36
  5. Step 5: Solve for x
    x = 134,029,058,229.36/328,052.40
  6. Step 6: Final answer
    x = 408,559.91

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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.