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Finding the Fourth Proportional to 547,151.40, 820,611.90 and 231,618.60

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Solution

The fourth proportional to 547,151.40, 820,611.90 and 231,618.60 is: 347,379.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,151.40 : 820,611.90 = 231,618.60 : x
  2. Step 2: Convert to fraction form
    547,151.40/820,611.90 = 231,618.60/x
  3. Step 3: Cross multiply
    547,151.40x = 820,611.90 × 231,618.60
  4. Step 4: Simplify right side
    547,151.40x = 190,068,979,421.34
  5. Step 5: Solve for x
    x = 190,068,979,421.34/547,151.40
  6. Step 6: Final answer
    x = 347,379.13

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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.