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Finding the Fourth Proportional to 325,930.20, 488,312.10 and 266,443.80

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Solution

The fourth proportional to 325,930.20, 488,312.10 and 266,443.80 is: 399,188.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,930.20 : 488,312.10 = 266,443.80 : x
  2. Step 2: Convert to fraction form
    325,930.20/488,312.10 = 266,443.80/x
  3. Step 3: Cross multiply
    325,930.20x = 488,312.10 × 266,443.80
  4. Step 4: Simplify right side
    325,930.20x = 130,107,731,509.98
  5. Step 5: Solve for x
    x = 130,107,731,509.98/325,930.20
  6. Step 6: Final answer
    x = 399,188.94

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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.