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Finding the Fourth Proportional to 621,493.76, 857,652.84 and 349,561.51

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Solution

The fourth proportional to 621,493.76, 857,652.84 and 349,561.51 is: 482,390.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,493.76 : 857,652.84 = 349,561.51 : x
  2. Step 2: Convert to fraction form
    621,493.76/857,652.84 = 349,561.51/x
  3. Step 3: Cross multiply
    621,493.76x = 857,652.84 × 349,561.51
  4. Step 4: Simplify right side
    621,493.76x = 299,802,419,662.06
  5. Step 5: Solve for x
    x = 299,802,419,662.06/621,493.76
  6. Step 6: Final answer
    x = 482,390.07

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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.