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Finding the Fourth Proportional to 572,670.78, 790,286.94 and 318,022

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Solution

The fourth proportional to 572,670.78, 790,286.94 and 318,022 is: 438,871.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,670.78 : 790,286.94 = 318,022 : x
  2. Step 2: Convert to fraction form
    572,670.78/790,286.94 = 318,022/x
  3. Step 3: Cross multiply
    572,670.78x = 790,286.94 × 318,022
  4. Step 4: Simplify right side
    572,670.78x = 251,328,633,232.68
  5. Step 5: Solve for x
    x = 251,328,633,232.68/572,670.78
  6. Step 6: Final answer
    x = 438,871.06

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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.