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Finding the Fourth Proportional to 621,371.82, 857,484.96 and 349,439.63

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Solution

The fourth proportional to 621,371.82, 857,484.96 and 349,439.63 is: 482,222.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,371.82 : 857,484.96 = 349,439.63 : x
  2. Step 2: Convert to fraction form
    621,371.82/857,484.96 = 349,439.63/x
  3. Step 3: Cross multiply
    621,371.82x = 857,484.96 × 349,439.63
  4. Step 4: Simplify right side
    621,371.82x = 299,639,222,865.54
  5. Step 5: Solve for x
    x = 299,639,222,865.54/621,371.82
  6. Step 6: Final answer
    x = 482,222.10

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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.