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Finding the Fourth Proportional to 318,422.31, 439,453.80 and 237,709.68

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Solution

The fourth proportional to 318,422.31, 439,453.80 and 237,709.68 is: 328,062.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,422.31 : 439,453.80 = 237,709.68 : x
  2. Step 2: Convert to fraction form
    318,422.31/439,453.80 = 237,709.68/x
  3. Step 3: Cross multiply
    318,422.31x = 439,453.80 × 237,709.68
  4. Step 4: Simplify right side
    318,422.31x = 104,462,422,172.78
  5. Step 5: Solve for x
    x = 104,462,422,172.78/318,422.31
  6. Step 6: Final answer
    x = 328,062.51

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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.