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Finding the Fourth Proportional to 572,718.05, 790,304.82 and 331,016.28

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Solution

The fourth proportional to 572,718.05, 790,304.82 and 331,016.28 is: 456,775.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,718.05 : 790,304.82 = 331,016.28 : x
  2. Step 2: Convert to fraction form
    572,718.05/790,304.82 = 331,016.28/x
  3. Step 3: Cross multiply
    572,718.05x = 790,304.82 × 331,016.28
  4. Step 4: Simplify right side
    572,718.05x = 261,603,757,377.52
  5. Step 5: Solve for x
    x = 261,603,757,377.52/572,718.05
  6. Step 6: Final answer
    x = 456,775.82

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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.