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Finding the Fourth Proportional to 318,861.47, 440,008.62 and 175,621.50

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Solution

The fourth proportional to 318,861.47, 440,008.62 and 175,621.50 is: 242,346.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,861.47 : 440,008.62 = 175,621.50 : x
  2. Step 2: Convert to fraction form
    318,861.47/440,008.62 = 175,621.50/x
  3. Step 3: Cross multiply
    318,861.47x = 440,008.62 × 175,621.50
  4. Step 4: Simplify right side
    318,861.47x = 77,274,973,198.75
  5. Step 5: Solve for x
    x = 77,274,973,198.75/318,861.47
  6. Step 6: Final answer
    x = 242,346.54

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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.