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Finding the Fourth Proportional to 448,860.31, 619,651.70 and 279,149.11

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Solution

The fourth proportional to 448,860.31, 619,651.70 and 279,149.11 is: 385,365.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,860.31 : 619,651.70 = 279,149.11 : x
  2. Step 2: Convert to fraction form
    448,860.31/619,651.70 = 279,149.11/x
  3. Step 3: Cross multiply
    448,860.31x = 619,651.70 × 279,149.11
  4. Step 4: Simplify right side
    448,860.31x = 172,975,219,169.24
  5. Step 5: Solve for x
    x = 172,975,219,169.24/448,860.31
  6. Step 6: Final answer
    x = 385,365.37

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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.