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Finding the Fourth Proportional to 629,625.90, 868,858.41 and 343,139.82

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Solution

The fourth proportional to 629,625.90, 868,858.41 and 343,139.82 is: 473,519.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,625.90 : 868,858.41 = 343,139.82 : x
  2. Step 2: Convert to fraction form
    629,625.90/868,858.41 = 343,139.82/x
  3. Step 3: Cross multiply
    629,625.90x = 868,858.41 × 343,139.82
  4. Step 4: Simplify right side
    629,625.90x = 298,139,918,412.89
  5. Step 5: Solve for x
    x = 298,139,918,412.89/629,625.90
  6. Step 6: Final answer
    x = 473,519.15

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1.5x scale

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.