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Finding the Fourth Proportional to 379,655.67, 523,908.23 and 218,515.89

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Solution

The fourth proportional to 379,655.67, 523,908.23 and 218,515.89 is: 301,542.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,655.67 : 523,908.23 = 218,515.89 : x
  2. Step 2: Convert to fraction form
    379,655.67/523,908.23 = 218,515.89/x
  3. Step 3: Cross multiply
    379,655.67x = 523,908.23 × 218,515.89
  4. Step 4: Simplify right side
    379,655.67x = 114,482,272,064.20
  5. Step 5: Solve for x
    x = 114,482,272,064.20/379,655.67
  6. Step 6: Final answer
    x = 301,542.37

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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.