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Finding the Fourth Proportional to 318,605.64, 439,687.49 and 175,371.72

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Solution

The fourth proportional to 318,605.64, 439,687.49 and 175,371.72 is: 242,019.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,605.64 : 439,687.49 = 175,371.72 : x
  2. Step 2: Convert to fraction form
    318,605.64/439,687.49 = 175,371.72/x
  3. Step 3: Cross multiply
    318,605.64x = 439,687.49 × 175,371.72
  4. Step 4: Simplify right side
    318,605.64x = 77,108,749,844.56
  5. Step 5: Solve for x
    x = 77,108,749,844.56/318,605.64
  6. Step 6: Final answer
    x = 242,019.42

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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.