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Finding the Fourth Proportional to 351,454.69, 485,043.27 and 253,418.57

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Solution

The fourth proportional to 351,454.69, 485,043.27 and 253,418.57 is: 349,743.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,454.69 : 485,043.27 = 253,418.57 : x
  2. Step 2: Convert to fraction form
    351,454.69/485,043.27 = 253,418.57/x
  3. Step 3: Cross multiply
    351,454.69x = 485,043.27 × 253,418.57
  4. Step 4: Simplify right side
    351,454.69x = 122,918,971,871.52
  5. Step 5: Solve for x
    x = 122,918,971,871.52/351,454.69
  6. Step 6: Final answer
    x = 349,743.44

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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.