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Finding the Fourth Proportional to 647,218.62, 893,125.28 and 356,820.56

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Solution

The fourth proportional to 647,218.62, 893,125.28 and 356,820.56 is: 492,392.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,218.62 : 893,125.28 = 356,820.56 : x
  2. Step 2: Convert to fraction form
    647,218.62/893,125.28 = 356,820.56/x
  3. Step 3: Cross multiply
    647,218.62x = 893,125.28 × 356,820.56
  4. Step 4: Simplify right side
    647,218.62x = 318,685,456,310.03
  5. Step 5: Solve for x
    x = 318,685,456,310.03/647,218.62
  6. Step 6: Final answer
    x = 492,392.29

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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.