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Finding the Fourth Proportional to 397,172.66, 547,878.21 and 251,711.30

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Solution

The fourth proportional to 397,172.66, 547,878.21 and 251,711.30 is: 347,222.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,172.66 : 547,878.21 = 251,711.30 : x
  2. Step 2: Convert to fraction form
    397,172.66/547,878.21 = 251,711.30/x
  3. Step 3: Cross multiply
    397,172.66x = 547,878.21 × 251,711.30
  4. Step 4: Simplify right side
    397,172.66x = 137,907,136,480.77
  5. Step 5: Solve for x
    x = 137,907,136,480.77/397,172.66
  6. Step 6: Final answer
    x = 347,222.13

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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.