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Finding the Fourth Proportional to 617,229.90, 851,855.67 and 345,312.90

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Solution

The fourth proportional to 617,229.90, 851,855.67 and 345,312.90 is: 476,575.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,229.90 : 851,855.67 = 345,312.90 : x
  2. Step 2: Convert to fraction form
    617,229.90/851,855.67 = 345,312.90/x
  3. Step 3: Cross multiply
    617,229.90x = 851,855.67 × 345,312.90
  4. Step 4: Simplify right side
    617,229.90x = 294,156,751,789.14
  5. Step 5: Solve for x
    x = 294,156,751,789.14/617,229.90
  6. Step 6: Final answer
    x = 476,575.67

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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.