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Finding the Fourth Proportional to 443,343.20, 664,561.20 and 218,357.60

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Solution

The fourth proportional to 443,343.20, 664,561.20 and 218,357.60 is: 327,312.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,343.20 : 664,561.20 = 218,357.60 : x
  2. Step 2: Convert to fraction form
    443,343.20/664,561.20 = 218,357.60/x
  3. Step 3: Cross multiply
    443,343.20x = 664,561.20 × 218,357.60
  4. Step 4: Simplify right side
    443,343.20x = 145,111,988,685.12
  5. Step 5: Solve for x
    x = 145,111,988,685.12/443,343.20
  6. Step 6: Final answer
    x = 327,312.99

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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.